27Options ListAdjust Screen contrastThe Screen contrast option allows you to adjust the contrast of the display on yourtelephone. After you select Screen contrast from the Options List menu;orFrom the Contrast screen, press theLower Key to decrease the displaycontrast level, or press the Higher Keyto increase the display contrast level.Press the Done Key to save changes. Press the Quit Key or Options Key to exit.Adjust volumeNote: After you select Volume adjustment. . . from the Options List menu, a list ofadjustable items for your telephone model appears. It is recommended that you adjustthese parameters while you are on a telephone call so that you can judge the impact of thechanges your are making.To adjust the Ringer volume:1. Select Ringer from the Volume menu.or2. Press the Lower Key to decrease theringer volume, or press the Higher Keyto increase the ringer volume.Press the Done Key to save changes. Press the Quit Key or Options Key to exit.Use the procedure above to adjust the volume on the following items:Note 1: Headset listen is adjustable on theM3903 and M3904 only.Note 2: Headset talk and Headsetsidetone are adjustable on the M3904only.Note 3: Headset sidetone (M3904 only) isthe sound of your own voice that you hearin the headset speaker.Lower HigherRingerLower HigherBuzzerSpeakerHandset listenHandsfree listenHeadset listenHeadset talkHeadset sidetone
