X-Mouse Button Control changes what physical mouse buttons do according to the application, window, or screen region under the pointer. It maps button presses to actions; it does not alter the mouse firmware or rename the buttons for every computer. A profile is the matching rule and its assigned button behavior. X-Mouse Button Control can therefore make a side button act as Back in a browser, send a keystroke in an editor, or control scrolling over a particular pane without forcing the same action everywhere.
Match the window
A profile can identify a target by its running process, window caption, window class, parent class, or a combination of those fields. This is more exact than assigning one rule to an executable. A single program can contain a document window, a toolbar, and an embedded panel that need different mappings. The profile list shows which entry currently owns the focus for commands, which helps when two matching rules appear plausible.
Precision also creates the first point of friction. A caption can change with the open document, while a window class may identify several controls. A broad match can activate over more of the interface than intended; a narrow match can stop working after the program changes its window structure. X-Mouse Button Control activates profiles as the pointer moves over the defined target, so a button may change meaning before the user clicks inside that window.
Build the layers
Each profile can hold up to ten layers of button assignments. Layers let one mouse carry several sets of controls without creating duplicate profiles. A fixed hotkey selects a layer and leaves it active until another command changes it. A modifier key or mapped mouse button can instead expose a temporary layer only while the control remains pressed.
Those methods do not behave alike. A modifier still reaches the active window, so the target program may react to the modifier while X-Mouse Button Control changes layers. A button used to hold another layer becomes a layer-revert control on that destination layer and cannot perform a second mapped action there. Chaining several temporary switches can also leave the user unsure which layer owns the next click. The notification-area menu gives a direct way to inspect or choose a layer when the shortcut path becomes unclear.
Send the action
X-Mouse Button Control can replace a click with common window commands, media controls, scrolling changes, or a sequence of simulated keystrokes. A simulated sequence can type a shortcut into the focused program, so focus matters as much as the profile match. Sending a shortcut to the wrong pane may trigger a valid command in the wrong place. Testing a new mapping with a reversible action is safer than starting with Close, Delete, or a long macro.
Layer-switch instructions can also sit inside a simulated sequence. They can choose a numbered layer, move forward or back, or return to the previously active layer. The previous layer and the preceding numbered layer are different destinations. A sequence that assumes they are the same can work during one path through the layers and fail during another.
Move the profiles
X-Mouse Button Control stores profiles for the current user and can export selected profiles or all of them to an xmbcs file. Opening that file imports its entries. When an imported profile conflicts with an existing one, the import asks whether to overwrite the current entry, discard the incoming entry, or cancel the entire operation. A whole-profile save includes every application profile and the broader settings, so loading it changes more than one mouse mapping.
Portable use still needs deliberate profile handling. The executable can travel, but the desired mappings must travel with it or use the configured portable storage location. Exporting before a large edit also gives a practical return point when a new process match, layer switch, or simulated key sequence affects more windows than expected.
