Introduction
Gamma allows you to design custom themes to match your brand or personal style. A theme defines the overall visual style of your content, including colors, fonts, slide styles and accent images.
🌀 Insight: A Theme is a saved look your whole workspace can reuse. Styles are one gamma's own copy of a look, so you can fine-tune that gamma without changing any others.
What's the Difference Between a Theme and Styles?
Theme: A saved, reusable look that lives in your workspace. Everyone in the workspace can use it.
Styles: A gamma's own copy of a look. Changes you make in Styles only affect that gamma.
Gammas made with the Gamma 5 agent use Styles. Other gammas still show the Theme button and point at a workspace theme.
What happens when I edit a workspace theme?
Gammas that point at the theme update automatically.
Gammas with their own Styles don't change. To update one, apply the theme again in that gamma. There isn't a way to update them all at once.
Workspace themes are still shared with your whole workspace. Styles are what keep one person's edits to a gamma from changing anyone else's.
How do I apply a workspace theme to a gamma with Styles?
In your gamma, open Styles.
Go to Themes > Use a theme preset.
Choose the workspace theme you want to apply.
How do I save a gamma's Styles as a workspace theme?
In your gamma, open Styles.
Go to Themes > Save as new theme.
Your theme is saved to the workspace and available to everyone in it.
💎 Pro Tip: Use Styles for one-off experiments, and save a theme to your workspace once it is polished enough for your whole team to use.
How to Create a Workspace Theme
If you want to save a workspace theme to use as a theme preset and keep everyone in your workspace on brand, there are four ways to create one:
Option 1: Save a Gamma's Styles as a Workspace Theme
Customize the Styles on any gamma until it looks the way you want.
In that gamma, open Styles, then go to Themes > Save as new theme.
Your theme is saved to the workspace and available to everyone in it.
Option 2: Create a New Workspace Theme from Scratch
Navigate to Themes.
Click New Theme.
Follow the step-by-step builder to customize your:
Background and primary colors.
Fonts and typography.
Design elements (buttons, links, and shadows).
Logos and accent images.
Save your theme to use it across your workspace.
Option 3: Create a Theme by Importing a PPTX or Google Slide
In the left sidebar, go to Customize > Themes.
Click + New Theme.
Select Import file.
Upload your file — either directly from your computer or from Google Drive. Only pptx and Google Slides are supported at this time.
Once the importer runs, you'll land on a review screen where you can check and adjust what Gamma detected from your file, including the theme name, primary accent color, background color, page background color, heading and body fonts, and logo. Colors detected from your file are shown for reference. Make any adjustments, then proceed.
When you're happy with how the theme looks, click one of the two options at the bottom:
Save and finish — saves your theme immediately and makes it available to your workspace.
Save and customize — saves your theme and opens the full theme editor in the left sidebar, where you can make deeper customizations across Colors, Fonts, Logo, Design, Images, Charts, and Custom CSS before saving.
Option 4: Edit an Existing Standard Theme
Click on the three-dot menu (…) at the bottom right of an existing theme.
Select Customize Theme.
Adjust the following elements:
Colors: Modify the color palette for backgrounds, links, and buttons.
Fonts: Change the typography, including font styles and sizes.
Logos: Upload a logo to appear on all decks using this theme.
Design: Adjust slide shapes, strokes, and shadows.
Images: Set default accent images and define AI-generated image styles.
How to Share a Theme with Another Workspace
Go to Customize > Themes.
Click Copy share link on the theme you want to share.
Send the link. The other person opens it and saves the theme into their own workspace.
This works the same whether the theme was made in Gamma Classic or Gamma 5. If the theme uses custom fonts you uploaded, the other person needs to replace those fonts before they can save it.
How to Customize a Workspace Theme
Customizing Colors for Text, Background and Theme Palette
Open the Theme Editor.
Navigate to the Colors tab.
Customize:
Background colors
Button and link colors
Element fills and outlines
Enter a Hex Code or use the color wheel to select colors.
Customizing Font Colors
Click on Fonts in the Theme Editor.
Adjust heading and body text colors.
Apply gradients for a unique text style.
The steps above are for workspace themes and gammas with a Theme button. In a gamma with Styles:
All headings or body text: open Styles > Colors > Text colors, click Heading color or Body color, and type your hex code into the HEX field in the color picker.
Selected text: the Text color menu shows your theme's colors and a set of named colors, but it doesn't take hex codes. To use an exact hex, add it first in Styles > Colors > Theme palette > Add color, then pick it from Text color.
All the text in one layout cell: select the cell itself (not the text inside it), click Text color, and enter a hex code under Custom color.
On Enterprise plans, admins can limit theme editing to admins. If you can't edit theme colors or add palette colors, ask your workspace admin.
Customizing Typography & Font Settings
Gamma allows more control over typography in custom themes. You can adjust:
Line height
Letter spacing
Base size
Uppercasing (for headings only)
Setting Font Sizes in Styles
In Styles, the two subheading size boxes are for H3 (left, 20pt by default) and H4 (right, 17pt by default).
Both are set to auto until you type a value. Typing a value pins that size.
Style sizes are a default, not a lock. If text still shrinks on a slide, turn off Scale content to fit.
How to Add a Logo
Add a logo to the gamma you're working on
In your gamma, open Styles.
Under Elements, select Logo.
Upload your logo. PNG or SVG files work best for clean, transparent rendering.
This only changes the current gamma. To reuse it, save the theme to your workspace with Styles > Themes > Save as new theme. If your gamma shows a Theme button instead of Styles, add the logo to its workspace theme.
Add a logo to a workspace theme
Go to Customize > Themes and open the custom theme you want to edit.
Select Logo and upload your logo.
Save the theme. The logo comes with it when you apply that theme preset to a gamma.
Choose where your logo appears
In your gamma, open the three-dot menu (…) in the top right and select Page setup.
Open Headers & footers.
Click + in the position you want and choose Theme logo.
🔷 Note: Headers and footers are available on Pro plans and above.
Customizing the Design
You can adapt the design of slides, blocks, content, buttons, and links:
Roundness: Adjust how sharp or rounded your blocks and images look. Go to Styles > Design > Blocks & content > Roundness.
Stroke and Shadow: Add outlines or hard shadows to content.
Block Colors and Fills: Customize the colors of smart layouts and interactive elements.
To set one fill color for every block in a gamma with Styles, open Styles > Design > Blocks & content and set Block fill colors. To reuse it in other gammas, save it with Styles > Themes > Save as new theme.
How to Set a Consistent Image Style
Open the Theme Editor.
Navigate to Images.
Add specific keywords for AI-generated images to maintain a consistent style.
Upload accent images to apply them to your custom theme.
FAQs & Common Issues
Why didn't my theme edits change my other gammas?
If you edited a gamma's Styles, those changes only affect that gamma.
If you edited a workspace theme, gammas that point at it update, but gammas with their own Styles don't. Apply the theme again in each of those gammas via Styles > Themes > Use a theme preset.
Why does one gamma show Styles and another show Theme?
Gammas made with the Gamma 5 agent have their own Styles. Other gammas show the Theme button and point at a workspace theme.
Can I share my custom theme with my team?
Yes. Save your gamma's Styles to the workspace via Styles > Themes > Save as new theme, and it becomes available to everyone in your workspace.
To share a theme with a different workspace, use Copy share link on the Themes page.
Why can't the other workspace save the theme I shared?
If the theme uses custom fonts you uploaded, they block saving until the other person replaces them with available fonts.
Will Remix keep my template's font sizes?
Yes, for sizes set in the template's theme or preset.
Sizes you set by hand on individual blocks aren't guaranteed to carry over.
What comes with a Gamma 5 template?
A copy of the template's theme, plus its page settings and layouts.
Why can't I import my document to the theme editor?
Ensure that your theme is saved as PowerPoint (.pptx) or as a Google Slide. Gamma does not yet support PDF or doc uploads to the custom theme workspace.
Why doesn't my logo appear on my cards or in Present mode?
Check that the logo is uploaded to this gamma: open Styles and select Logo under Elements.
Then make sure it's placed on your cards: open the three-dot menu (…) > Page setup > Headers & footers, and add Theme logo in the position you want. Headers and footers are available on Pro plans and above.
Can I import themes from Figma or Canva?
Currently, Gamma supports importing from PowerPoint and Google Drive, but not from Figma or Canva.
Why aren't my custom fonts displaying correctly?
Check that your font files are correctly uploaded under Themes > Edit Theme > Fonts.
Can I pin or favorite fonts I use often?
There's no way to pin or favorite fonts, but you can search for any font by name in the font menu.
To keep your go-to fonts at the top of the list, save them in a theme. The theme's fonts always appear first in the font menu, labeled Theme default.
To save them, open a gamma, click Styles, set your heading and body fonts, then go to Themes > Save as new theme.
To use that theme for every new gamma, go to Settings > Design & templates > Workspace default theme.
Why isn't my heading using a gradient when I have it set that way in my theme?
When a slide has a custom background color (like one you picked from the palette or recolored manually), Gamma automatically checks whether the heading gradient is readable against that background. If any part of the gradient doesn't have enough contrast, Gamma swaps the whole gradient out for a solid color: black on light backgrounds, white on dark ones.
Turning off "Adjust colors for contrast and accessibility" in theme settings doesn't prevent this. That setting only affects slides using the theme's default background color. On those, Gamma nudges gradient colors slightly instead of replacing them. On a slide with a custom background color, the contrast check always runs, regardless of that setting.
To get your gradient to show, either reset the slide to the theme's default color, or pick a slide color your gradient reads clearly against.
Can I use a brand template? Is a theme the same as a template?
Themes and templates are different things. A theme controls how your gamma looks: fonts, colors, logos, and styling. A template is pre-built content and layout you start from. For brand consistency, create a brand theme, either by hand in the theme editor or automatically with Import your brand, and apply it to everything your team creates.
Where is the Theme Editor / Themes menu, and how do I customize a theme?
Themes now live under Customize, which is the new name for the old Gamma library. Go to Customize from your dashboard to see your themes, create a new one, or edit an existing custom theme. The theme editor lets you set fonts, colors, logos, and styling that apply across every card in a gamma using that theme.
How do I change font size across all slides at once?
If your gamma has Styles, change the sizes in Styles and every slide in that gamma updates.
If your gamma shows the Theme button, edit the theme in Customize and adjust the base text size. Every gamma pointing at that theme updates at once.
How do I reduce the space above and below my sections or text?
The space between lines of text comes from your theme's Line height setting. A lower line height makes text, and the sections it sits in, more compact.
To change it, open the Theme Editor, click Fonts, open Advanced, and lower Line height.
Can I change the line spacing of just one block or sentence?
Not right now. Line height is set for the whole gamma or theme, not per block.
If your gamma has Styles, change it in Styles > Fonts.
If your gamma shows the Theme button, open the Theme Editor, click Fonts, open Advanced, and change Line height.
Why do my theme colors look darker than the hex codes I entered?
Adjust colors for contrast and accessibility is turned on, so Gamma darkens pale colors to keep text readable.
To keep your exact colors, untick Adjust colors for contrast and accessibility in the theme's color settings.
Can I remove the bold from links?
Not right now. You can change the link color in your theme, but not the link's font weight.
Can I round the corners of just one image?
The Roundness setting applies to the whole gamma: open Styles > Design > Blocks & content > Roundness.
To round one image only, select it and ask the agent, for example: "make the corners of this image rounded."
How do I delete a theme?
Go to Customize, find the theme under your custom themes, open its options menu, and choose delete. You can only delete custom themes you or your workspace created; Gamma's standard themes cannot be deleted. Deleting a theme does not delete gammas that used it.