Using your Bosch GST18V-50N jig saw is a breeze. First, make sure you have a fully charged 18V battery. Then, use the tool-free T-shank blade-change system to insert the blade. Adjust the variable-speed dial according to the material you're cutting. For more precise speed control, use the variable-speed trigger. If you need different cutting effects, select one of the four orbital-action settings. When using it, keep the dust blower and LED light in mind to ensure you can clearly see the cut line. As for maintenance, after each use, clean the saw and the blade to remove any dust or debris. Also, check the blade for wear and replace it if necessary. Make sure to store the saw in a dry place when not in use. And remember, since the charger is not included, always use a compatible charger for the battery. Have fun with your jig saw!