1, document slimming refers to the operation of optimizing, simplifying, compressing and optimizing the document format, and reducing the size of the document while retaining the core content and format of the document. Document slimming is to reduce the space occupied by documents by removing unused fonts, embedded pictures and useless marks, thus speeding up the transmission and opening of documents.

2. Compression refers to compressing a document so that the file can be stored in a smaller space, thereby reducing the file size. Before compressing the document, it is necessary to package the document, put all the document elements into a file, and then compress the file with compression software. Compressed files need to be decompressed before they can be viewed and edited. Although compressing a document can effectively reduce the file size. So document slimming and compression are different.