The Result Set Tab is where the results of a query are displayed. You can sort the results by clicking on any column heading. A result set can be copied to the clipboard, saved to a file, or printed as a report (just click on File > Print). See the Query Toolbar and Query menu for options.
To select a group of cells, click in the top-left cell and, keeping the mouse pressed down, drag down to the bottom right cell.
If the group is large - and especially if you want to select all cells - an easier technique is to click in the top-left cell. Then (without keeping the mouse pressed down) scroll down till the bottom right cell is in view. Then press-and-hold the Shift key and click on the bottom right cell. This will select all cells in between. You can use the same technique to select all cells in a column.
Double-click on any cell that is linked to a record or field, to locate that data item in the Propery Box.