Size of recently opened files list For each file that is opened in an editor, it is stored in a list of recently used files. This option controls the number of files which is displayed in this list in the File menu. 4 Show multiple editor tabs Specifies whether you wish to show multiple editor tabs. If off, then editor workbooks have one large tab and all non-visible editors are accessible only from the chevron. On Close all editors on exit This option is used to specify whether or not to close all editors when the Workbench is exited. Enabling this option will speed up start up as reducing the amount of work required to start Eclipse. Off Close editors automatically This option is used to specify whether or not to re-use editors in the Workbench. If turned on, then you may specify the number of editors to use before they are recycled (Default is 8). You can also specify if a prompt dialog should be opened or if a new editor should be opened when all editors are dirty. Once it is turned on, the Pin Editor action is added to the toolbar and editor tab menu. Pinned editors are not recycled. Off Text File Encoding Use this option to specify the encoding to use when saving text files in editors. Default (CP1252)
Here is what the Editors preference page looks like:
