Selecting the Guide menu selection from the main TV menu will bring up the TV Program Guide.

As you navigate around the Guide, the top description for each show changes to highlight the program details. The top right has the current time and day. The following Meedio commands are operational when in the TV Program Guide screen:
Arrows - These keys navigate around one channel or one 30 minute time block at a time.
Enter - This key selects a show to either view in the TV Player screen (if its currently on) or to call the Record screen dialog to schedule a recording.
FFWD/REW - These commands will jump the next/previous day's listings
Previous/Next - These commands will jump one "page" at a time backwards/forwards, which by default is 90 minutes.
ChannelUp/Down - These commands will jump a page up/down with each press.
STOP - This command will bring the Guide to the current time. This is helpful if you have navigated to a few days in the future and want to see what is currently playing.
GUIDE - Pressing this command will bring up the Filter screen allowing you to filter the channels shown according to your favorites. You can configure the favorites channel lists in the TV Settings module.
RECORD - This command will schedule a recording for the highlighted show, even if it is currently on. If its currently on, it will record the remaining portion of the show.
EXIT/BACK - These commands will close the TV Program Guide screen
For more information about Meedio commands and how they relate to Windows keys see here
Customizing the Program Guide screen
NOTE: This requires manually editing one screen file. Make sure you make the proper precautions before editing this file.
The TV Program guide screen uses a screen control that can be modified to change the look. The default Program Guide screen is at <Meedio Essentials>\plugins\module\EPG\EPG.screen. Open this file in a text editor.
Inside this file is a epg control that has a line like this: <epg name="epg" >
The following lines can be modified to change the look of the EPG screen:
row_size - By default it is set for 1/5, which means 5 channels are shown. You could change this to something like 1/7 to display 7 channels.
time_slots - By default it is 3, which means it shows 3, 30 minute time slots, or 90 minutes total. You could change this to 4 to show 2 hours of data at a single time
channel_size - By default this is 15/100, which is the percentage of the screen size the channel information is shown on the left. You could change this to 20/100 to show more information there
header_height - By default this is 1/9 which means the header bar (with the time slot display ) takes up 1/9 of the display.
show_now_marker - Defaults to true, which shows the little yellow bar at the current time. Change to false to turn this off.
show_categories - This is a property that tells the Program guide how to color the programs by genre category. Separate each category by a | character, and the first item in each tag is a color in the form of AARRGGBB where the AA is the transparency value in hex. Follow each color by a semicolon, then a comma-separated list of categories that should be that color.