Adjust the rows/columns in excel sheet to fit cell content

1. Click the Select All button. or click an unused cell outside the range of data and press Ctrl + A. The entire sheet will become grey (highlighted).

2. Next hover between the columns or rows as needed until the line with arrow on both sides appears (picture below). Then double click to AutoFit the columns to fit the cell content.

Another way is as follows

1. Click the Select All Button.

2. Click on the Format Button and select AutoFit Row Height or AutoFit Column Width.