ctrl + t

Ctrl + tab I meant.

I edit standard_toolbar.ini, try to hide tab bar, but have no success? Is that possible?

[Pagebar.alignment]
Alignment=0
Auto alignment=0
Old visible alignment=2
Collapse=1

That should work. Just note that you'll have to use ctrl + t to switch tabs and ctrl + w to close the current tab. And, you'll have to use the title at the top left to kind of get an idea of what tab you're currently on.

Can you tell me how to hide Main Opera button (upper left corner) if it possible?

It's easier to do in Opera 12. But, in Opera Mail, close down Opera and edit standard_toolbar.ini in the "toolbar" folder in your preferences folder (not the one in the "ui" folder in the program files folder) and add the following at the bottom:

[Pagebar Head.alignment]
Alignment=0
Auto alignment=0
Old visible alignment=2
Collapse=1

You can then reach the menu items by pressing the alt key.

If "standard_toolbar.ini" isn't present in the "toolbar" folder yet, customize something on one of your toolbars.

without "Press ECS to exit in fullscreen mode"

Adding:

Show Fullscreen Exit Information=0

to operaprefs.ini under the [User Prefs] section should get rid of that.

As for starting Opera in fullscreen, you can modify the opera mail shortcut where you add the fullscreen switch to the operamail command line this:

"C:\Program Files (x86)\Opera Mail\operamail.exe" /fullscreen

Then, you press F11 to get out of it.

I create button what shows contacts window, but I can't create button what shows contacts tab (like Menu -> Contacts), it is possible to create button with this functionality?

The command in standard_menu.ini for that menu item is:

Manage, "contacts",,,"Menu Contacts"

I'm assuming that'd work for a button too if you use:

Manage, "contacts",,"Contacts","Panel Contacts"

in the Button Creator page. If I place that button on the mail panel next to the check/send button for example, it opens in a new tab for me.

The button on the mail panel header in standard_toolbar.ini that opens in the panel instead of a new tab is:

Focus panel, "contacts",,,"Panel Contacts"

, which you should see the difference.

Also, instead of sending yourself a message with the opera button link it it, you can compose a new message, paste the link in it and then look at the corresponding message in "All Messages/Drafts" where you can then click on the button link. Then, you can discard the draft. That way, you don't have to actually send a message.

Can somebody an explain of structure of standardtoolbar.ini

What you do is create a special opera:// URL that represents a button with commands and send that link to yourself in an email. Then, in the received message you click the link and Opera will give you an option to add the button to "My Buttons" under "Right-click on toolbar -> customize -> buttons -> My buttons" where you can then drag it to the toolbar you want.

See this zip file for an mhtml file that has more info and an html file that has a button link creator.

See https://web-beta.archive.org/web/20150624162613/operawiki.info/AllActions for an old command list that's referenced in the mhtml file. Also see https://web-beta.archive.org/web/20150623005533/http://operawiki.info:80/CustomButtons that's referenced in the mhtml file. You can hover over the button links to see the opera:// links. But, you'll have to strip the archive.org parts before opera:// first.

Still interests me how to add a button"contacts" that opened "contacts" in the separate tab (not window)?

"Menu -> Contacts" should do that. It's not a button though.

hide F4 Toolbars > Panels. But after restart it shown again

Close down Opera Mail and edit operaprefs.ini. See "Menu -> Help -> About Opera Mail" for the location. Under the [User Prefs] section, add this line (if it's not there) and set it to 0 like the following. Save changes.

Auto Mail Panel Toggle=0