You may use "Subject Area" to group tables by theirs category. Here is a video on how to use "Subject Areas" and other features that help organize large diagrams.

Hi,

Please add a person from AP group as a "Payment administrator" of your company account. She/he will be able to add billing info and subscribe plan or pay (pay per use). Other company members don't have an access to billing info. This way is supported by Vertabelo right now. Not sure if it suits you. I'll forward your question to our finance guy.

Hi,

This is a place where you can put an expression (predicate) that will check if the value of the column is valid. You may think about it as a column validator. This is described here https://en.wikipedia.org/wiki/Check_constraint. Leave it empty if you don't want any check.

Hi,

I'll add your idea to our list.

There are tools which helps you make the diagram look goods already. Select tables (mouse click with pressed "Control" key) and choose align or distribute tool from menu bar.

Please take a look on these screenshots:

Hi,

It's fixed already. Please register using your work address.