Highlight that column, the width you want to change. To do this, just hover your cursor on the letter, which he marked horizontally, and click on it with the left mouse button. You can select multiple adjacent columns or those that are not located next to the selected. If you want to select adjacent columns, click the first one and the last while holding down the Shift key. If you want to select to change the width of several, non-contiguous columns, then mark the selection, hold down the Ctrl key. To change the width of the selected column or more, you can using different methods.
Position the cursor on the right border of the cell, on which is written the letter and drag it, manually adjusting the width of the column "the eye". Simultaneously, the column will change width of all the others that you have identified. It will be the same at all, even if the original width was different.
In the menu "Main" select a field "Cell" and click on the word "Format", select the third item from the top – "Width of column". In the dialog, you can set the desired width of the columnby typing its exact numerical value. Width of all selected columns will be equal to this value.
If you need to adjust the width of the column depending on the length of a string of text or numeric values, follow the same steps, only select the menu "Format" fourth line from top to "AUTOFIT". In this case, the width of each selected column will be different. For each of them, it will be equal to the record length, located in this column, consisting of the maximum number of characters. This is useful when the number of rows in the table is large, and you don't have to scroll through it to set the desired width of the column manually. AUTOFIT can also be made by clicking the mouse two times on the right side of the letter header of the allocated column.