In MS-Project how could I adjust the time to 12 hrs instead of 24 hrs?

It is just by Clicking at CNTRL and 1 at same time and inserting the time (12:00:00 AM/PM)

1. Change the Hours per week value to 84.

2. Change the Hours per day value to 12.

3. Change the Default start time value to 12:00 AM and the Default end time value to 18:00 PM

4. Change the Days per month to 30.

5. Press the OK button, when the above changes have been completed.

CTRL+1 and then use 12:00 format

choose File > Options > Date Format and select the format of the date

or use ctrl+1

Thank you for your question.

You can use the number format by using Ctrl+1 to show Cell Format dialog box.

Then, use the below format:

hh:mm:ss am/pm

Regards