+ Added dateTimeUtcNow to documentation

docs/globalvariables.md

@@ -24,6 +24,10 @@ header will be replaced on `bearer 4354534534534534534`.
 `Control-R` - Remove selected line.  
 `Shift-Alt-R` - Remove all lines.
 
+### Quickly insert global variables in the Query Editor
+You can insert global variables in the Query Editor. To do this, you can place the cursor where you want, insert a global variable and press `Ctrl-0`.
+After this, a pop-up window opens with all global variables. You can select the desired variable by pressing `Up` or `Down`, and press `Enter` to insert the variable or `Escape` to cancel operation.
+
 ### Predefined global variables
 You can use predefined global variables to inject some stuff like date, time, etc.
 
@@ -32,6 +36,11 @@ You can use predefined global variables to inject some stuff like date, time, et
 It will be replaced to the current date according to local time in ISO 8601 format.
 Example: `2024-01-01T12:00:00`
 
+#### `dateTimeUtcNow`
+
+It will be replaced to the current date according to UTC in ISO 8601 format.
+Example: `2024-01-01T12:00:00`
+
 #### `time24HoursNow`
 
 It will be replaced to current local time in 24 hours format.