If I understand @Rellwood correctly, I have seen a similar issue a couple of times. I have also seen this issue with lots of other programs. Excel does give you the option to set the column width manually on a column, but most don't and the only way around it is to start at the end and resize the columns until you can see a part of the previous column and that allows you to resize it.
A contrived example is using a template
Quote:
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(?P<title>.*?) \-\-\- (?P<authors>.*)\-\-\- (?P<series>.*)\-\-\- (?P<series_index>.*)\-\-\- (?P<published>.*)
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with a clipboard source
Quote:
H.G. Wells: Masterpieces: The Invisible Man, The Time Machine, The War of the Worlds, The Food of the Gods... (Bauer Classics) (H.G. Wells Definitive Collection) --- H.G. Wells --- --- --- 2020
Belfast Noir --- Adrian McKinty & Stuart Neville & Glenn Patterson & Eoin McNamee & Garbhan Downey & Lee Child & Alex Barclay & Brian McGilloway & Ian McDonald & Arlene Hunt & Ruth Dudley Edwards & Claire McGowan & Steve Cavanagh & Lucy Caldwell & Sam Millar & Gerard Brennan --- --- --- 2021
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In order to resize title, you first have to shrink the authors column until you can see a bit of the title column.
The more columns you have the more annoying it is, but with any of the templates I have used with import list, there are not many columns, so the issue doesn't cause me any inconvenience.
Since the scroll bar scrolls columns you can't see what is at the end of the title column if both it and the next column are the full width of the grid, so I have seen some grids that restrict the 'resize to maximum width' feature so that it is just slightly less that the total grid width. It does look strange, but seems to reduce this problem.