The Merge Graphs to Layout Dialog is a simpler tool to merge the specified graphs into a layout window.
If you want to do some advanced settings during merging the graphs, you are supposed to use the Merge Graph Windows tool instead.
Specify which graphs will be listed in Graphs box and merged into the layout.
Once when Specified is selected for Selection drop-down list, you are allowed to customize the graph list. Click the button beside the list box to open the Graph Browser to select more graphs.
Specify the number of rows/columns in the new graph. The graphs will be arranged on a row by col grid in the new window.
Specify the spacing between and around the graphs, which is based on the page dimension of the source graphs.
This option is similar with the Spacing branch of Merge Graph Window dialog which is based on the target graph window.