In Roundcube web e-mail software 1.66, how do you display all 3 columns 
and have the font size so it is readable? I can increase the font by 
using the CTRL key and my mouse scroll bar, but if I do that, I will 
lose one column. If I show all 3 columns by using the CTRL key and my 
mouse scroll bar the font size is too small for me to read.