Yes. You need a free digital input (GPIO) on the controller for this. Then you can connect a button between this input and ground (GND), for example a momentary button. If you press down the button, this GPIO is connected to ground at that moment and the controller registers this as a click. However, for this to happen, the button must be set correctly in the WLED preferences. First, a button must be configured. To do this, under Config->LED Preferences you have to assign the GPIO number to which the button is connected to a “Button” (e.g. you take “Button 1” first). You also have to define the button type. For momentary button it is a "Pushbutton". Then you can set what should happen when the button is clicked. To do this, go to Config->Time & Macros. Here in the "Button actions" area you can define up to three Presets for each button (enter Preset ID) that must be executed if a button is pressed down briefly, long or double-clicked (therefore three columns). Of course, presets must have been created beforehand. For switch type button you can define what preset should be called when it switches on and off. The third setting (third column) does not hae any meaning in this case.