What is the meaning of each of these buttons on the remote control of the projector?

AV-MUTE audio/video silent , AUTO ADJ. auto projection, S-VIDEO HD port, ECO MODE power-saving mode, FREEZE: Freeze screen key, kind of like a pause key.

Other keys:

FLIP: Screen rotation key, select this key, the screen can be flipped up and down, left and right, and so on. Sometimes the projector has to be mounted upside down or hanging, and the screen will need to be flipped up and down to ensure that it is a normal screen when you watch it, and at this time, there is a FLIP key.

VOL+, VOL-, these two keys are volume up and down keys to adjust the sound size.

Extended information:

Projection quality of the projector projection, not only with the brightness of the projection bulb is related to the projected, but also with the impact of the projection environment is also related to a greater. Projector working environment of the light intensity will directly affect the effect of projection, therefore, before using the projector, must first set up a good projector working environment, as far as possible to make the projection bulb work in a dim light environment.

Bright ambient light will make the brightness effect of the projection bulb become poorer, and students viewing effort. In order to get a better projection effect, we may want to install dark opaque curtains in the room to block the outdoor light, the walls of the room to use materials that should not be reflective, these details will make the projector in the projector bulb brightness of the same situation to produce a better projection effect.