User blog comment:Triple-One/Help?/@comment-24216186-20131214231056

oooooooh oh oh I can help you with SAI! Oh gosh, I know it's a pain in the butt myself >XI

https://www.google.com/search?q=paint+tool+sai+interface&source=lnms&tbm=isch&sa=X&ei=5OSsUoPnA-XEyQHVyIHgAw&ved=0CAcQ_AUoAQ&biw=1280&bih=911#facrc=_&imgdii=_&imgrc=Phmz5_wsddkFCM%3A%3B-qDMVqX2-5lpmM%3Bhttp%253A%252F%252Ffc06.deviantart.net%252Ffs46%252Ff%252F2009%252F171%252F0%252Fb%252FEasy_Paint_Tool_SAI_interface_by_easypainttoolsai.jpg%3Bhttp%253A%252F%252Feasypainttoolsai.deviantart.com%252Fart%252FEasy-Paint-Tool-SAI-interface-126602986%3B950%3B685

I hope that link shows up... otherwise just search paint tool sai interface on google ^^;

okay so for SAI, to change brush sizes, right under the smoothing pressure and "+ Advanced Settings", theres those multi-sized black circles. you click on one and it changes the size of the pen.

For FireAlpaca, it's basically what Paws said... XD

I hope this helped you somewhat... you can ask me for more help if needed XD