With the Advanced Optimization command, you can select professional settings to achieve advanced PDF optimization. To optimize PDF with advanced settings, please do as the following:
- Choose File > PDF Optimizer > Advanced Optimization > Advanced Optimization.
- The PDF Optimizer dialogue box pops up.
- Click Audit space usage to see the space usage of the current PDF file and then you can decide which items are needed to be optimized.
- In Make compatible with, select a PDF version to save the current file under. See also PDF Versions. The settings available in the following steps vary from different PDF versions.
- Select the check box next to an item on the left and do the corresponding settings as needed on the right. If you deselect the check box for an item, all the settings associated with the item will not be applied. For the detailed options in each item, please refer to Advanced optimization options.
- (Optional) To save your optimization settings above for future use, click the
icon at the top of the dialog box and input a name for the optimization. Your saved optimization will be listed as options in the drop-down list for the Predefined Settings item at the top of the dialog box. To delete your saved optimization options, select the option from the drop-down list, and then click the 
icon next to the list. - Click OK and save the optimized PDF file.