Created attachment 8697 screenshot with red highlighted areas Steps: 1. Open panel preferences dialog. 2. Notice that 's' in 'Row Size' is capital on the Display tab 3. Notice that 'i' and 's' in 'Fixed Icon Size' are capitals on the Appearance tab when disabling 'Adjust size automatically' Tested on Xubuntu 19.10 Daily
Created attachment 8698 patch
Yousuf Philips referenced this bugreport in commit ea7a59272a46de7f1a475e5f70fde614d9211883 prefs: Correct capitalization of labels (Bug #15651) https://git.xfce.org/xfce/xfce4-panel/commit?id=ea7a59272a46de7f1a475e5f70fde614d9211883