create new table from existing cells

You can make a new table from a range of cells like this:

1. If you can't see much blank canvas around the table because the table takes up too much of the window, it might help to zoom out before starting
2. Select a rectangular range of cells
3. Click and hold somewhere with the selection box and the cells will lift from the table
4. Drag them to an empty space on the canvas then drop them.

After getting these cell to be a separate table, you may want to convert the first row and/or column of that table into headers if the information in them is headers/labels, not data. And you might want to create a footer row if the last row is a row of formulas that sum up the columns (or something like that). You can do it a few ways. One way is to use the format sidebar. In the Table tab of the sidebar, select how many headers and footers you want.

You can use the same technique to relocate entire rows or columns and also to rearrange rows or columns in an existing table.