Add an A/B slider to Compare Tool

[Nicolas]

2) the two files must have exactly the same width and height

OK thanks, that's my issue!

Pierre, I suggest that if the A/B function is unavailable, it should be grayed out, to make things clearer...

[xnview]

Pierre, I suggest that if the A/B function is unavailable, it should be grayed out, to make things clearer...

It is greyed if it can be used

[Nicolas]

Pierre, I suggest that if the A/B function is unavailable, it should be grayed out, to make things clearer...

It is greyed if it can be used

I just did a test and yes, it is greyed but only in the light themes! Here is a screenshot taken when A/B is unavailable:

AB not dimmed.png (22.19 KiB) Viewed 1198 times

[xnview]

yes on dark theme the disabled text is not really visible