re Customizing user interface in eM Client - Email Read Column View.
Manually changing the default eMail Read view columns (by clicking the top of the message list and opening the ‘Columns configuration’ and creating the preferred setup and then using the Apply Column Configuration to Other Folders option"
However, this option requires you to individually select all folders, one by one. If you have alot of folders this is extremely (prohibitively) tedious. Would it be possible to provide “apply to all” option please?
When the window opens with the selection for Apply Column Configuration to Other Folders, click on one folder, then use Ctrl + Space to select them all.
Then click on an “Account Inbox”, and “while holding the Command or Ctrl key” (depending on your Mac OS Keyboard setup), either manually select other account folders.
Or you can click on an “Account Inbox”, and then “while holding the Shift key”, select a group of folders or select all the folders in one go within an account.