Hi,
I wonder why so much space is lost even on a 5" screen with a message margin which is much too big.

see http://pix.tdct.org/upload/original/1462694866.png

I tried to modify a custom theme (width/height screen resolution), and investigate '/data/data/com.p1.chompsms/shared_prefs/chompSMS Preferences.xml' without any success.

Any idea to achieve this even by tweaking files ?

The proposal is then: decrease lost space on conversation screen.

Thanks.