Created attachment 2269 [details] Size of columns in three columns mode changes after closing or switching screen layout. When using the three-column view, resizing of the rightmost column (i.e. the one where the messages are displayed) is not saved and restored when closing claws-mail and opening it again. Also, when switching from three-column view to standard view and back, the width of the columns changes again. In claws-mail 3.18, the size of the columns would be restored after starting the client again, in 4.0.0 this only happens in for the rightmost columnn (with the folders) and in standard layout. I'm not sure if my explanations are clear, so I've attached a video of the phenomenon (blurry due to the size restriction). The menus clicked are "View" -> "Screen Layout" -> "Standard"/"Three Columns"
*** This bug has been marked as a duplicate of bug 4513 ***