Sjálfvirk efnisskipan

If the selected cell range contains formulas or references, LibreOffice automatically outlines the selection.

For example, consider the following table:

janúar	febrúar	mars	1st Quarter	apríl	maí	júní	2nd Quarter
100	120	130	350	100	100	200	400

The cells for the 1st and 2nd quarters each contain a sum formula for the three cells to their left. If you apply the AutoOutline command, the table is grouped into two quarters.

To remove the outline, select the table, and then choose Data - Group and Outline - Remove.