To Select Additional Images in a View

  1. Select the Raster Selection tool ( Drawing > Attach > Raster > More split button).

  2. Ctrl + click the additional images. That is, while holding down the Ctrl key, click the additional images.

    The additional raster filenames highlight in the Raster Manager dialog (if open). If Display Raster Border ( File > Settings > User > Preferences , Raster Manager category's General tab Settings > Preferences > General tab) drop-down is set to When Selected, the images highlight in the view(s) as well. If you control-click a previously selected image, it is deselected.