An Activity is a place where work takes place on Work Items.
Work done at Activities usually takes up time and sometimes requires the availability of Resources. At an Activity, a Work Item may be transformed in some way. After the work is done the Work Item should be sent on to another step in the process.
To create an Activity click the Activity button on Drawing Simulation Objects Panel and then click where you want the Activity on the simulation window.
Connect it to other objects using routing arrows.
To move an Activity: drag it on the simulation window. To copy an Activity: drag it with the CTRL key on the keyboard held down.
To inspect or change the Activity's parameters select it and it's contextual ribbon tab will open. Alternatively double click on the Activity on the simulation window, this will open the Activity Dialog box.