Workbench 1.0
Workbench 2.04

These GUIs don’t have this feature.

DeskTop 1.1
GS/OS 5.0.4
GS/OS 6.0.1

These GUIs don’t have this feature.

BeOS R5.0.1 PE

Volume level in BeOS R5.0.1 PE (Audio Mixer)

CDE 1.5 in Solaris 9

This feature is not yet documented on this site.

GEOS 2 for C64
GEOS 2.1 for Apple II
GeoWorks Ensemble 2.0
NewDeal Office 3 Eval.
BreadBox Ensemble Lite

These GUIs don’t have this feature.

GNOME 2.2.0 in RedHat 9

This feature is not yet documented on this site.

IRIX 5.3

Volume level in IRIX 5.3 (Audio Panel) with thanks to Ian Young. The screenshot is a reproduction.

Lisa OS 1.0
Lisa OS 3.1

This feature can be found in the General section.

System 1.1
System 3.0
System 4.2

This feature can be found in the General section.

System 7.0

Volume level in System 7.0 (Sound)

System 7.5.3

Volume level in System 7.5.3 (Sound)

Mac OS 8.0

Volume level in Mac OS 8.0 (Sound)

Mac OS 9.0

Volume level in Mac OS 9.0

Mac OS X DP

This GUI doesn’t have this feature.

Mac OS X DP 2
Mac OS X DP 3
Mac OS X DP 4
Mac OS X Public Beta
Mac OS 10.0.4

This feature is not yet documented on this site.

Mac OS 10.1

Volume level in Mac OS 10.1

Mac OS X Jaguar

Volume level in Mac OS X Jaguar

Mac OS X Panther

Volume level in Mac OS X Panther with thanks to Jonathan Westin

OPENSTEP 4.2
Rhapsody DR2

This feature is not yet documented on this site.

MS OS/2 1.30.1
OS/2 2.1

These GUIs don’t have this feature.

OS/2 Warp 3

Volume level in OS/2 Warp 3 (Volume Control)

OS/2 Warp 4

Volume level in OS/2 Warp 4

QNX 6.2.1 NC

Volume level in QNX 6.2.1 NC (Audio Mixer)

ArthurOS 1.2
RISC OS 3.11
RISC OS 3.7

These GUIs don’t have this feature.

Sibo/Psion Series 3a
Sibo/Psion Siena
EPOC R5/Psion Revo
EPOC R5/Psion Series 7

These GUIs don’t have this feature.

Windows 1.01
Windows 2.03
Windows 3.0
Windows 3.1
WfW 3.11

These GUIs don’t have this feature.

Windows NT 3.1 Workstation

This feature is not yet documented on this site.

Windows NT 3.51 Workstation

Volume level in Windows NT 3.51 Workstation

Windows 95
Windows 95B

Volume level in Windows 95 (Volume Control)

Volume level in Windows 95

Windows NT 4.0 Workstation
Windows NT 4.0 Server

Volume level in Windows NT 4.0 Workstation (Volume Control)

Volume level in Windows NT 4.0 Workstation

Windows 98

This feature is not yet documented on this site.

Windows 98 SE

Volume level in Windows 98 SE

Volume level in Windows 98 SE (Volume Control)

Windows 2000 Pro
Windows 2000 Advanced Server

Volume level in Windows 2000 Pro (Volume Control)

Volume level in Windows 2000 Pro

Windows Me

Volume level in Windows Me (Volume Control)

Volume level in Windows Me

Whistler 2257

Volume level in Whistler 2257 (Volume Control)

Volume level in Whistler 2257

Windows XP Pro

Volume level in Windows XP Pro (Volume Control)

Volume level in Windows XP Pro

Windows Server 2003 Web
Longhorn 4015

This feature is not yet documented on this site.