I'd like to view/edit 2 files simultaneously in the same UE session and position the files vertically side-by-side. I found a topic that discussed vertical "split" but only by opening two UE sessions.
Click and hold on one of the open file tabs. Then drag that down into the editing pane and across towards the other open file, and then release the mouse button.
If you use this regularly, you can assign the menu item Window - Tile Vertical with tooltip Tile Windows Vertically, etc. to buttons, so they are always there. I have that on my toolbar along with a button for menu item Window - Synchronized Scrolling with tooltip Vertical Synchronized Scrolling. Of course you can put just about any function on the toolbar with UE, it's very configurable.
Phil, if you are still using UltraEdit for Windows v21.20 which was the latest version October 2014 and you have enabled Window - Enable tiling / Dockable tabs, the command Arrange windows vertically as non-overlapping tiles is already in MAIN toolbar, see the attached image. Toolbars can be modified in UE v21.20 by right clicking on any toolbar to open the context menu and left clicking on context menu item Customize Toolbar ....
This command can be also executed by key. Open Advanced - Configuration - Key Mapping, search in Commands list for WindowTileVertically (unsorted commands are listed in order as in main menu) and assign the hotkey you can easily remember like Alt+Shift+V to this command.
But arranging document windows side-by-side is only possible with pointing device using drag & drop on using not dockable file tabs. There are no commands in this file tabs / document window mode for arranging document windows.
Command to tile windows vertically in MAIN toolbar of UltraEdit for Windows v21.20.
Best regards from an UC/UE/UES for Windows user from Austria
I'm using UltraEdit Professional Text/HEX Editor Version 18.20.0.1028.
I found the dialog using Advanced > Configuration and assigned ALT+SHIFT+V to the tile command and it works.