Click the Increase Indent icon to increase the left indent of the current paragraph or cell content and set it to the next default tab position.
If several paragraphs are selected, the indentation of all selected paragraphs is increased. The cell content refers to the current value under Format - Cells - Alignment tab.
Click the Increase Indent icon while holding down the CommandCtrl key to move the indenting of the selected paragraph by the default tab distance set under LibreOffice Writer - General in the Options dialog box.
The indents of two paragraphs are moved with the Increase Indent function to a standard tab distance of 2 cm:
Indent increased by the amount with the CommandCtrl key.