select "edit sound object" and check the "loop until it stops" option.
Let the background music play continuously in multiple PPT. We can easily control the background music to play in some or all designated PPT slides by simply setting it in "Custom Animation". The specific method is as follows:
Complete all PPT slides. In the slides where sound needs to be inserted, click Movie and Sound → Sound in File under the Insert menu, and select the required sound file. When "Do you want to play sound automatically during PPT slide show?" Select "Yes" when the dialog box is opened.
if you are operating in PowerPoint2, right-click the new sound icon "Small Speaker", select "Edit Sound Object", check the "Loop until it stops" option, and finally click the "OK" button. (In order not to affect the visual effect of PPT, you can drag the "small speaker" to the lower right corner of this slide at this time. )
Right-click the sound icon "Small Speaker", select "Custom Animation", open the "Custom Animation" window, and click "Continue Slide Show". At this time, the "Stop Playing" item below it will change from inoperable gray to solid color.
Next, click "After which slide", then fill in the serial number of the slide that needs to stop playing in the box, and finally click "OK". (You can also check "Hide when not playing" here, so that the sound icon will not be displayed during playing PPT. ) so that the specified background music can be played continuously in several PPT films.
1. The pictures are automatically played without repetition
Put one picture on one slide, and change the film changing mode in slide switching (below the right) to "How often"
2. The pictures are automatically played with repetition
(1) All slides are repeated
A, and the film changing mode in slide switching is set to "How often" < Press the ESC key to terminate "
(2) Repeat several slides
A, make these slides into another PPT (named ppt2)
B, set the slide switching mode and slide show settings for ppt2 one by one
C, where PPT2 needs to be inserted in PPT1, click Insert/Object/Select PPT2 and select PPT 2.