I am saying your issue is not understanding the switch UI but rather how to configure, implement, and use VLANs. A manual for the switch UI would not help you here in this situation, a manual on how to use VLANs would be of great help. OUr manual will teach to you how to setup the switch not implement VLANs or how RSTP works or how LACP works just how to navigate the UI as a network tech should know the fundamentals.
I am more than willing to help you understand anything related to the switch but I am not willing to teach you how to use VLANs and what they do and do not do.
If you do not understand how VLANs work spend some time reading some articles on the internet and understand how VLANs work.
Then try your best to implement them in a LAB environment before trying to implement them into production.
If you can not quite get your LAB to work right then post up a screen grab of your VLAN Tab with a detailed description of desired behavior with a diagram showing your equipment and how you want the VLANs to segregate your traffic.
I have been a WISP for over 20 years, when I started I did not understand VLANs either and it took a while to wrap my mind around them. But never did I contact the switch manufacturers to teach me nor did their "user manual" provide me any more information other than how to configure the interface.
I did a lot of reading then I spent days playing with them in my office in a LAB setup until I figured it out.
If you were setting up a VLAN and you found a bug in our firmware I would be all over this trying to get you a fix.
Look, I respond to people in hours not days, but if I constantly have to answer the same questions over and over again because people do not search for the answer first then all I would do is that and people would wait a long time for help.
Will I complain if someone does not use the Search feature to see if they can help themselves from previous posts asking for help with the same issue.....YES
My job is to provide tech support for the switch not teach networking 101. I will try to help people that have tried to help themselves first and put up a very detailed post explaining what they have done and what they can't figure out and help to connect the dots.
If you want my help then put up a VLAN screen grab, a diagram of what you want to happen along with a detailed explanation of what is not working the way you think it should.
You have not even given half the information needed to give you an answer anyway.
As an example below is an example of breaking a switch into 2 logical switches:Logical Switch 1 Ports 8-14
Logical Switch 2 Ports 1-7
Devices in ports 1-7 can not see or talk to devices in ports 8-14 and vice versa
But you could also not reach the switch UI or CLI from ports 1-7 as the switch only responds to the Default VLAN which is the VLAN at the top of the list, the one you can not delete and it has all "E"s for exclude on those ports. (The switch only responds on the Default VLAN)
Also the example below would not accept any Tagged packets, only Untagged packets.
If I changed all the "U"s to "T"s then ports 1-7 would only accept packets with a VLAN ID Tag of 2 and ports 8-14 would only accept packets with a VLAN ID Tag of 1.
Then with "T"s instead of "U"s in both cases the packet would leave the port with the VLAN Tag intact since the egress port also has a "T".
The switch UI could only be reached on ports 8-14 with packets with a VLAN ID Tag of 1 destined to the IP of the switch UI/CLI.
This is now turning into a text book on how VLANs work not a Switch Manual.
But there are many posts on this Forum if you use the Search Function and search for simply "VLAN" and read through the posts.