For months now I have had a simple layout for my daily readings.
Info and Explorer on the right.
The ESV (no columns) on the its left
The Africa Bible Commentary next
and on the far left Highlighting
(on a second screen Bible Facts sits open on its own)
Each day I follow the M'Chayne plan set the commentary for the next day and save the layout.
Today the ESV has opened with a two column panel, I can see by the historical layouts that the layout I saved had a single column - why/how the change?