%a

Specifies the application name in a window title.

This means that if the string returned by
envGetVal( "designEditor.window" "windowNameFormat" 'string)

does not contain sub-string "%a", it is automatically added in the front of the return value.

For example, if a user sets
envSetVal( "designEditor.window" "windowNameFormat" 'string "%l %c %v")
a layout session window title is updated to:
Virtuoso (R) Layout Suite L <lib-name> <cell-name> <view-name>

But if it is set to "%l %c %v, %a", the window title reads as follows:
<lib-name> <cell-name> <view-name>, Virtuoso (R) Layout Suite L

%m

Specifies the access mode, such as editing.

%l

Specifies the library name.

%c

Specifies the cell name.

%v

Specifies the view name.

%x

Specifies the configuration, such as, <lib> <cell> <view>.

%L

Specifies the top library name.

%C

Specifies the top cell name.

%V

Specifies the top view name.

%h

Specifies the hierachy path, which is the value of the geGetInstHier SKILL function.