I would enjoy Illustrator a lot more if I had the option to make the UI that of Photoshop's. It allows me to easily and quickly manipulate the layers, unlike in Illustrator. In illustrator, if I wish to change the opacity of a layer and solely a layer, I've found it to be impossible, since the opacity slider changes the opacity of my brush tool for future use, even if I manipulate its opacity back to 100%. Why is the desktop version of Illustrator so much less user-friendly than the free iOS and Android application versions? The only reason that I'm posting this here instead of just using Photoshop is because Photoshop isn't a vector program, and draws with pixels. The reason I'm not using Illustrator Draw is because it doesn't have all the tools I need to make everything I would like to; I like using my pressure-sensitive Wacom to variate my lines, but am constantly flustered by poor UI decisions and accessibility. For me, and many others like me, I hope you adjust some things accordingly, as it can be frustrating to lose your mind over something as small as changing a layer's opacity, and just that layer's opacity.
Thank you, and with much consideration
Aran, if you want to change layer opacity in AI, open layers panel, click target circle (right to the layer name) and then change opacity via Transparency palette.
If you already know that — sorry for being rude.
If you didn't — have you ever tried searching 'change layer opacity illustrator'?
Illustrator is not Photoshop.
They share a lot, but very many things are different and always would be different, because 'it has been like that' paradigm. For example, 'Snap to grid' is Ctrl+Shift+" in AI, but Ctrl+Shift+; in PS (in fact, it's just a half true, because PS doesn't allow to quickly turn on snapping only to grid).
Don't be fooled by seemingly similar UI.
What I think Adobe should really do, reading this, is to:
1. Make a shortcut for 'Target Current Layer' command, which is not there now (or even 'Target Selected', which will target current layer, if nothing is selected)
2. Add 'Target Layer' button to Transparency palette, when nothing is selected, in the empty area, where selected artwork thumb is usually displayed
These will give users ability to quickly target layer and set it's opacity, both mouse and keyboard oriented.
I'll make a separate request for this.
Good luck on your path and stay calm.