1. Most menus are defined by properties in jedit.jar:\org\gjt\sp\jedit\jedit_gui.props. You have to find the matching property, copy it to a .props file (as described in my other answer) and change the property. It's easy, but keep in mind that You will never get any changes made by the developers to a menu You've customized anymore as long as You override it by Your own property.

Here's an example which:
- removes the "Markers" menu item
- adds an "testmenu" item to the main menu
- reduces the "View" menu

# original main menu definition:
#view.mbar=file edit search markers folds view utils macros plugins help-menu

# changed main menu
view.mbar=file edit search folds view utils macros testmenu plugins help-menu

# new main menu item with 2 items: a macro (relative path) and an action
testmenu.label=$Test
testmenu=Misc\Show_Threads.bsh \
split-horizontal

# reduced view menu
view=new-view \
new-plain-view \
close-view \


2. The Macros menu mirrors all files of the macros subdirectory of jEdit's program directory...

Robert

Plugins are loaded from two places: (a) the user's settings directory and (b) the "jars" subdirectory of jEdit's program directory. Plugins that are installed in the latter are automatically loaded for all users who use this installation. The install procedure is trivial: Just copy the plugin's jar file and - if there are any- other jars it depends on.

If You want to preset some properties for all users: Create a file with extension ".props" an save it to the "properties" subdirectory of jEdit's program directory. Now You can grab each property You want from Your ~\properties file and copy/move it to the new .props file. For example, the property "console.dock-position=bottom" docks the console dockable at the bottom. Or "next-buffer.shortcut=C+TAB" assigns the shortcut "CTRL+TAB" to the "next-buffer" action. These properties become the new default. Users can override them as usual.

Robert