Showing when powerpoint was last saved?

Question

How can i create a text field and show the time and date when the file was last saved?

Answer 1

To put the last saved date on each slide Click on View > Header Footer... > make sure there is a checkmark in the Date and Time > enter your
To apply header and footer information to several but not to all slides, select the slides you want before starting this procedure. You can select them on the Outline tab or Slides tab in normal view, or in slide sorter view.

On the View menu, click Header and Footer, and then do one of the following:

Add headers and footers to slides

Click the Slide tab, and then select the options you want.
To add an automatically updating date and time, under Date and time, click Update automatically, and select a date and time format. Or, to add a fixed date and time, click Fixed, and type a date and time.
To add a number, click Slide number.
To add footer text, click Footer, and type your text.
Do one of the following:
To add the information to the current slide or selected slides, click Apply.
To add the information to every slide in the presentation, click Apply to All.
Notes

If you don't want the information to appear on the title slide, select the Don't show on title slide check box.
If you are using multiple design templates and therefore have multiple master (slide master: The slide that stores information about the design template applied, including font styles, placeholder sizes and positions, background design, and color schemes.) slides in your presentation, when you select Apply to All in the Header and Footer dialog box, the settings apply to all the designs in your presentation.