# Overlay mode

Creating overlays and insets

You input individual .eps files or else a library file referencing a set of .eps files and then a default overlay is created. Then you select files in sequence in order to move them about and perform any re-scaling required to make the overlay. Note that to do this you select files one at a time. Translating and scaling only occurs with the file currently selected. It should be realised that, when PostScript files are overlayed in order to create sub-graphs, the file destined to be the sub-graph should be after the file that is to be the master graph in the sequence of files.

If you intend to use a graph as a sub-graph in a master graph you should appreciate that the line thicknesses and font sizes of the inset sub-graph will be reduced as the sub-graph is scaled down. To prevent this happening you should scale up the line thicknesses and font sizes when creating the sub-graph file in program Simplot.

Adding titles and text to an overlay

There are several ways to add a title and text to the overlay. You can create a text file in Create mode and use this as one of the collage .eps files. Another way is to read the overlay .eps file into Editps in Stack mode (as 1 file) in order to add a caption title and text. Alternatively, for simple actions like adding a page number, you can create a text file interactively to be used as an extra file when composing the overlay. This technique has the added advantage that it is very easy to edit the overlay .eps file retrospectively, to change the page number for instance. All that is required is to read the .eps overlay file into a text editor and change the appropriate text string at the bottom of the file.

These technique are very useful if you want to create a graph with a large or multi-line title. To do this, you simply create the plot with no title then, using Editps in Overlay mode, the new title is added.

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