You can create a list and add patents to it. There are 4 scenarios you can create a list:
1. On the search result page, to add all patents on the page to a list, click "Add All patents on this page to list" 
2. Again on the search result page, to add one patent to a list, click the small "add to list" button as shown below. 
3. On the patent page, to add the patent to a list, click "Add to List".
4. In "Advanced Search" page -> under "Bulk Download" tab, to add a set of patents to a list, input a set of patent numbers, click "Add to List". 
When the "Add to List" window pops up, enter the name of a new list to add the patents to. You can enter more than one lists and separate them by comma. As a result, the patents selected will be added to all these lists. You can also add the patents to an existing list (highlighted in blue).

Click "Tools" -> Select "Lists" -> Click to open one list. You will see all the patents in that list.

Click "Tools" -> Select "Lists" -> Click to open on one list -> Find the patent you want to remove, click "Delete". 

In "Advanced Search" page, under "Bulk Download" tab, input a set of patent numbers -> click "Add to List".  When the "Add to List" window pops up, enter the name of a list to add the patents to or select a list from the existing patent lists.

Sure. Click "Tools" -> Select "Lists" -> Click to open one list-> Click "Analyze"

There is no limit. You can create as many as you like.

Yes. The person will receive an email that tells her you have shared a list of patents with her. She needs to sign up for a PatSnap account to access the list. Once she signs up with the same email address, the list you shared will show up in her list collection. 

Click "Tools" -> Select "Lists" -> Find the list you want to delete -> Click "delete".