You can try PPT batch processing treasure chest, which has a file slimming function, that is, all the pictures in PPT are compressed in one batch to reduce the file size. The biggest advantages of using it are: ① All the pictures in the whole PPT can be automatically processed in batches, and even several PPT can be processed continuously in batches; ② You don't need manual operation when compressing the picture, and you don't need to process the picture yourself, so you can hand it over to the computer directly.

If you want to manually compress the pictures one by one, you can. You need to save the pictures used in PPT one by one, then use professional picture compression software to compress the pictures, and then manually replace the original pictures in PPT.

Manual operation is troublesome, time-consuming and ineffective.

I hope my answer can solve your problem!