Make clearer for learners how to increase the text size on the app.

[seanlip]

Platform
Oppia Android

Describe the request

A couple of users have asked us to:

• Make the text a bit bigger for readability (1 user on Play Store)
• "I couldn't make the text bigger, which made reading a bit difficult. Adjustable text size would be better." (1 user, Mar 2024)

However, we actually have this functionality already in the lesson player! The feedback above suggests that it might not be discoverable enough.

Some things to consider:

• The current functionality only affects the lesson player, not other things in the app. Is that an issue? Should we rethink the feature and make it profile-wide?
• Should a user be updating the text size in the phone system settings instead? If so, how do we train them to do that?

Context for the request

This is a suggested improvement to the current Android app.

UXR success criteria

• Users should be able to discover how to change the text size, and successfully do so.

DESIGN APPROVAL CHECKLIST -- DO NOT EDIT.

• UX Design approved (Android mocks should include dark mode)
• UX Writing approved
• Design Systems Team approved
• Product approved

For a design project to be completed, it needs approval from UXD, UXW, DS and PM. Please tag the following reviewers when your project is ready (at least one reviewer for each of the 4 bullet points below):

• UXD: @ashley-ya (for Android projects)
• UXW: @ccc253 / @tamiorendain
• Design systems: @ashley-ya
• PM: @seanlip