Where are the tab-settings in Notepad++ newer versions?

Solution 1:

As of 2016 these were moved to:

Settings > Preferences > Language > Tab Settings.

Solution 2:

As @JohnDoea discovered in Answering his own Question, indeed Settings > Preferences > Language > Tab Settings is where to find tab settings. I was about to refute what he said when I finally noticed the easily-overlooked (at least by me), tiny area at lower right of that window. If you click whatever's underlined (for me it was 2), you get a dialog box where you can change Tab Size.

Note that under Tab Settings is the option normal, which produces the following window, in which there is a way to set the default tab size:

Using version 7.5.6.

Before composing this Answer, I wasn't familiar with the new location setup for tabs. I don't recall where it used to be, but it wasn't as hard to find as it was for John and me.

Upon further consideration, I guess this is as good a place as any for tab settings.

But a suggestion: instead of having to know to look at the Language option in the first listbox to find Tabs, add Tabs to the list box and let its selection also bring you to the window above.

And another: add a way to get to tab settings by modifying View > Tab (below) to also bring up the window above.