After you have downloaded the WinEdt Macro Library or some single macros, put the file(s) in a subdirectory of %b\Macros.
%b is WinEdt's local directory, which is different from %B. While %B always means the WinEdt program directory (usually it is C:\Program Files\WinEdt Team\WinEdt), %b means:
Note that this has changed from earlier versions of the macro library, which was to be saved in %B. Why? Because putting all user additions into the local directory makes it much easier for you to maintain your additions over WinEdt upgrades.
To run a macro once, use the Menu Item "Macro | Execute Macro", and choose the macro file you want to execute.
However, if you want to use a macro frequently, you should consider either putting it in a Menu or assigning a keyboard shortcut to it (or both):
WinEdt's Menus are completely user definable. All customizations are performed in the Dialog "Options | Menu Setup".
If you prefer to use a mouse interface, you might want to make an entry in a Main Menu:
A different interface is provided with Popup Menus. You can use either visible popup menus or invisible menus. These are especially efficient for use with (Emacs-like) double-shortcuts:
Some macros are accompanied with prepared files that let you automatically add complete menus (extension: .dat). To add these menus,
Some macro packages provide additional installation instructions. Please consider reading it.
To learn even more about changing WinEdt's menu configuration read WinEdt's on-line help.