Users learning Kanji need big type sizes to see the characters clearly. This is possible in the Popling desktop app preferences:
Click the gear icon (app preferences) in the top right corner
In the preferences pane, find the ‘theme’ drop down and select the ‘large vocab’ theme
That should increase the size enough to help you see characters correctly.
If enough people request this feature, I can add it to the web interface as well.
- Happy learning!