How do I fix space in table row when using the 'Fit' button on Numbers app?

I have never seen it do this without a reason, I have never seen it work incorrectly.

Tell us more about the cell content: are any of them formulas or is it all manually typed-in data or is it copy/pasted from somewhere or is it imported from Excel, or something else? Is the cell content set to "automatic"

If you want to do some testing that might help figure it out when/where it is breaking, here are some steps I'd take:

1. Make a duplicate of your document so you are not doing this on your actual document.
2. Select A9:S9 and use Command X (cut). Did the row resize to one line after the content was removed?
3. If it did not automatically resize to one line, use the "fit" control in the sidebar. Did the row resize to one line?
4. Paste the content back into the row (so you don't lose it). I assume the row goes back to not fitting correctly.
5. Create a new row and make sure the height is set to "fit". Is it the correct height?
6. One by one copy/paste a cell from row 9 into this new row. Is there any one cell that causes the problem?

'Fit' shouldn't leave space. Perhaps you have extra invisible characters in the text that Numbers is making room for?

Can you post a screenshot? (shift-command-4, select area, release, start a new post here and use the mountains-and-moon 'Image insertion' icon to attach the image from the Desktop).

SG

If you first selected row 9 and then clicked 'Fit' and you still get that result then I'm guessing you must have content "taller" than you think in one or more of the cells in that row somewhere. It just may not be visible. Extra returns at the end of the comment or something like that.

SG

Another thing you can try is to select A9:S9, Copy, then Paste it into a new TextEdit document that is set to "rich text". It will create a table from it. If it does the same thing there, then it is not a Numbers problem (or at least is not isolated to Numbers).

I can't replicate that here. Do you happen to have more columns off to the right with text in them? 'Fit' will fit to the "tallest" cell in the row.

SG

Any hidden columns to the right of column S?