Hi,
If you could first change the “Stepping through a Script” window type from WindowTool to WindowSizeable, that would be great.
My screen is 3440 px wide and the window always opens in 2064 and is not resizable, which means I have to move my mouse and head a lot between the text (top left) and the buttons (bottom right).
It's like writing on a horizontal A3 page.
Wide screens are becoming more and more common: in my development work, I avoid opening default windows in full screen or non-resizable size (the user often has several applications open at the same time)
Below, AutoItInfo on this window (size: 2064)
>>>> Window <<<<
Title: Stepping through a Script
Class: ThunderRT6FormDC
Position: 965, 207
Size: 2064, 846
Style: 0x16C80080
ExStyle: 0x00000101
Handle: 0x00000000000D0CF0
Apart from that,

bravo: I've been using TC for over 20 years and DO for 3, but I find now XY much more ergonomic and containing a host of excellent little subtleties. (Help is excellent, his attentive reading made me discover many things, thanks for keeping it in .chm and not on the web).
Let's hope that one day XY will be compiled in 64 bits (personally, I haven't had a single 32-bit machine for 5 years and no one of my user use 32 bits machines now, so I have stopped develop for 32 bits). I think this will increase stability on large file operations.
But I know that there are sometimes difficulties with the availability of libs and plugins that make it difficult to recompile 32-bit applications in 64-bit.
