Select cells
To select multiple cells, uses CTRL + Click (or ⌘ + Click on Macintosh). Hold CTRL (or ⌘) and click on all the cells that you want to select.
To select multiple adjacent cells, uses SHIFT + Click. Click on the first cell, then hold Shift and click on the last cell.
Import LaTeX tables
Under the logo, there's a File menu. Click on it and then follows File > Import table > LaTeX.
My table is too wide ! What can I do ?
You can fix the issue if you are generating LaTeX code. To do so, select the menu items Output > Settings. Then, choose an option under Fit table to page method.
More help
If you have more questions, check the FAQ.