You can resize the width of table cells and columns, as well as change the height of table rows.
Do one of the following:
Rest the mouse pointer over the column dividing line until the pointer becomes a separator icon, and then drag the line to a new location.
Rest the mouse pointer over the column dividing line on the ruler until the pointer becomes a separator icon, and then drag the line to a new location.
Hold down CommandCtrl and then click and drag a line to scale all cells right or above the line proportionally.
Place the cursor in a cell in the column, hold down the OptionAlt key, and then press the left or the right arrow key.
To increase the distance from the left edge of the page to the edge of the table, hold down OptionAlt+Shift, and then press the right arrow key.
You can specify the behavior for the arrow keys by choosing LibreOffice - PreferencesTools - Options - LibreOffice Writer - Table, and selecting the options that you want in the Keyboard handling area.
Hold down Option+CommandAlt+Ctrl, and then press the left or the right arrow key
To change the height of a row, place the cursor in a cell in the row, hold down the OptionAlt key, and then press the up or the down arrow key.
To change the width and height of a table, do one of the following:
Click inside the table. In the rulers, drag the border between the white and the gray area to resize the table.
Click inside the table. Chooseto open a dialog and set the properties to the numbers.
To wrap text to the sides of a table, and to arrange two tables next to another, you must insert the tables into a frame. Click inside the table, press CommandCtrl+A twice to select the whole table, then choose Insert - Frame.
Tables within HTML pages do not offer the full range of properties and commands as tables in OpenDocument format.