From the list of tables that are currently open, select the layer(s) you want to add.
To add a contiguous block of layers, select the first layer, hold down the Shift key, select the last layer, and click OK.
To add multiple layers that are out of sequence, hold down the Ctrl key, select the layers, and click on OK.
To deselect layers, hold down the Ctrl key, click on the layers.
If you select objects in one of the maps before opening the Add Layer dialog box, then it displays in the list as a table called Selection. Choosing this table adds a layer to the Layer Control's Layer list using a unique name, such as Query1.
OK
Click to add selected layers to the Layers window list.