A fantastic collection of various deep space objects, imaged in HaLRGB by Jim Misti. Working with just the L (luminance) frames, before delving into HaLRGB combining, is great way to learn the ropes.
Results are free to publish, as long as they are credited "Image acquisition by Jim Misti".
Thanks for all your hard work and a fantastic product that I can't recommend strongly enough!
The 'AutoMask' button launches a popup with access to two quick ways of creating a star mask.
Even the way StarTools displays and scales images, has been created specifically for astrophotography.
AutoDev will keep solving for a global strecth that best shows the detail in your RoI.
You are forgiven if, at first glance, you get the impression StarTools offers only the basics.
You can convert everything you see to a format you find convenient. Give it a try!