See http://zabbix.org/wiki/Docs/bug_reporting_guidelines
and https://www.zabbix.com/documentation/3.0/manual/introduction/whatsnew300
Closed.

@zalex_ua I did discuss this in the IRC and I was told to open a issue since the dropbox is actually missing.

In the whats new doc you point I see the entry "Map, screen and slide show listings can now be filtered by name." But I dont see anywhere saying you were getting rid of the dropbox.

I see that you don't see this as bug but perhaps It could be a "Feature request" to be able to change between screens in a faster way ?

indeed, as a minimum removal of the dropdown should go in the upgrade notes...

Now there is a well noticeable link "All screens" instead of the drop down.
That part was redesigned a lot and mentioned a bit at at https://www.zabbix.com/documentation/3.0/manual/introduction/whatsnew300#new_web_interface

I don't think at makes much sense to document every "new pixel" of reworked 3.0 interface.
Otherwise we could go too far when trying to document each "new pixel"

that's slightly downplaying removal of a dropdown calling it a "new pixel"
a functional change that should have went in the upgrade notes before users report it as a regression...

ok ok, reopened ....

...also here's an example of it done properly for the 2.4 latest data changes
https://www.zabbix.com/documentation/2.4/manual/installation/upgrade_notes_240#changes_in_latest_data_page