Djisves

"Open Recent" will not open a file if it was (a) deleted, (b) moved or (c) renamed. Possible solutions (a) Like @toe_head2001 suggested, look in the Recycle Bin, (b) Search the file name with File Explorer to see if you can find it in another folder (c) Check all image files in the folder you think you saved in case your file was renamed by mistake.

If I was @BoltBait, I'd keep my distance ?

You can toggle the floating windows on and off using the F5, F6, F7 and F8 buttons to access the menu and buttons behind them.

Here is a list of all shortcuts: https://www.getpaint.net/doc/latest/KeyboardMouseCommands.html

Yes it does: Ctrl+Shift+X

In this particular example, the easiest way to accomplish what you need is to add each image to a new layer and change layer all Layer Properties to "Additive" or "Lighten" (no need to do that for the bottom layer).

Another: One way to accomplish this, is to use a plain B&W radial gradient as a mask over a four-way gradient. I remember doing this a while back.

Congratulations to the winners and all.

What @MJW suggested (he replied while I was typing), plus a few more techniques at these topics that could work:

I think I've learned from this competition. Congratulations to well deserved winner @MJW, @Pixey and @welshblue for their placements and everyone who entered for their quality entries.

@BoltBait wrote a plugin some time ago to address this. It works well with right angled objects. Hopefully someone with the ability and time will work on improving it further.

I also usually use the same method as @Eli . Another way that sometimes works well in is to draw the first line on its own layer, copy the layer and then move the new layer with the Move tool.

As the only entrant to be left off the podium, congratulations to everyone ?

Oh, the brilliance of the man! Thank you @xod for reminding me to revisit this gem: