My Current AIReader Preferences (Work in Progress):
As usual tapping 4 screen corners turns pages. Tapping screen's centre toggles showing full-screen vs. statusbar + bottom goodies
I've enabled the 9 customizable bottom buttons
to show. I've set them to the following functions:
Reduce & increase font size (pinching fingers also works superbly)
Next & previous page
Next & previous chapter
This is an epub file:
Easily switch 2 profiles from menu, I set one for day and another for night reading in bed:
Tap screen's centre to toggle showing full-screen view as in the 1st photo in this post. The arrow on right is Button_Savior app.
As said in OP, I change rotation ( portrait / landscape) with notifications (using mentioned app). Justification works better for some epub/mobi/txt files. BTW converting PDF files to RTF works better than simple txt.
You might easily spend an hour on customization of AIReader and not get it right. You can simply use the above settings I currently have, which is still changing. In system root files:
Replace your com.neverland.alreader_preferences.xml
with the uploaded attachment. 10 seconds job with Total Commander.