Decrease Indent
Click the Decrease Indent icon to reduce the left indent of the current paragraph or cell content and set it to the previous tab position.
If you previously increased the indentation for several collectively selected paragraphs, this command can decrease the indentation for all of the selected paragraphs. The cell content defers to the current value under Format - Cell - Alignment.
Decrease Indent
If you click the Decrease Indent icon while holding down the CommandCtrl key, the indent for the selected paragraph is moved by the default tab stop that has been set under LibreOffice Writer - General in the Options dialog box.