# Manage Fallback Fonts for Presentations in Python via Java

> See how Aspose.Slides for Python via Java uses fallback fonts to keep text readable in PowerPoint and OpenDocument presentations when original fonts aren’t available.

Source: https://docs.aspose.com/slides/python-java/fallback-font/
Updated: 2026-09-14


## **Introduction**

Fallback fonts are used when the font specified for text is available in the system but does not contain a required glyph. In this case, Aspose.Slides can use one of the specified fallback fonts to replace the missing glyph.

## **Fallback Font**

Aspose.Slides allows you to create fallback fonts, add them to a fallback font collection, set the fallback font collection for a certain presentation, remove fallback fonts from the presentation, specify the rules for applying fallback fonts, and perform other related operations.

To get familiar with these features, use the following links:

- [Create Fallback Font](/slides/python-java/create-fallback-font/)
- [Create Fallback Fonts Collection](/slides/python-java/create-fallback-fonts-collection/)
- [Render Presentation with Fallback Font](/slides/python-java/render-presentation-with-fallback-font/)

## **FAQ**

**How do fallback fonts differ from font substitution?**

Fallback is applied per character or per range of Unicode when the primary font lacks specific glyphs; it fills just the missing characters. [Substitution](/slides/python-java/font-substitution/) replaces a missing or unavailable font for an entire run or text portion with another font. They can be combined, but their scope and selection logic are different.

**Are fallback settings saved inside the presentation file?**

No. Fallback configuration lives at processing/rendering time in the library and is not serialized into the PPTX. The presentation does not store your fallback rules.

**Does fallback affect elements created by PowerPoint objects (SmartArt, charts, WordArt)?**

Yes. Text inside these objects goes through the same rendering pipeline, so the same fallback rules apply to it as to regular text.