I have been having the same problems. Heres how you do it.
Go down to advance settings, click the PLUS and check the boxes Den, Size, And Blend.
you buy it. ( paint tool sai is about $50 ) Or if you can find a download crack that works too.
Go to help/config, and the tablet pressure will be at ___% for you. if it is at 100% then your tablet pressure should not be working, if it is at 100%, change it to 0 and test that. If it still dosent work go to advanced under the tool and clock density, still not working your sai cant see you have a tablet or your pen is defected.
You can use pressure only if you have a tablet because with the pen you are able to press and get the pressure from that. But if you are having problems with SAI make sure you go to others>options>digitizer support and see if the pressure is set to 0. If not change it now! Also make sure you have the "min size" (found under the tools which are under the color wheel) and have the set to 0 also.
You would use the marker/pen/brush tool, or the paint bucket tool.
With a writing tool such as a pen or pencil. You can also use paint brushes if you feel froggy.
You can't do a gray pen color, but you can push the paint tool and click the ? button.
pen tool creates straight lines from first point you clicked to second, then you can modify it, freeform pen tool you use as pencil in school
Pen Tool connects anchor points with straight line which can be changed to curve (you are inserting anchor points with pen tool which are start and end of line) and freeform pen tool can produce any shape of line, also adding anchor points.
1. The Brush tool lets you draw lines that look like brushstrokes.2. The Sprayer tool lets you spray objects, such as snowflakes or bubbles, along a path.3. The Calligraphic tool lets you draw lines that resemble strokes drawn with a calligraphy pen.4. The Pressure tool lets you draw lines that resemble strokes drawn with a pressure-sensitive pen
Look in your local art store for the pen,and in Home Depot for the paint. if they don't have your exact colour they will tint it.
pen is to paper brush is to paint
Paint.