To see history or bookmarks
   click left arrow to get to bookmarks from history
   click on history at the top of the list to get to history from bookmarks
swipe from outside screen on left to right - go to history or bookmarks
click bookmark - go to web page
long press - drop-down menu (edit, delete, ...)
+ in address bar - bookmark
+ on right- new tab with speed dial

Dolphin at Google Play
Help at dolphin-browser.com
  Features: Android Gesture, User Agent & Voice Control Add ons
  FAQ | dolphin-browser.com


swipe from left margin - history and bookmarks
swipe from right margin - full screen, wi-fi 

How to install bookmarklets in the dolphin browser:
long press on the bookmarklet.  e.g. HREF visible

Select copy link URL
Create a bookmark from any page (Click the + button at the address bar)
Select Add Bookmark, assign a name and folder
Swipe right (from left border) to get bookmarks and select folder
(You can add a new bookmarklet folder by hitting the gear  icon
Then hitting the folder icon  )
long press the bookmark you created above
Select Edit bookmark
long press in address
Select paste
Create a gesture (optional)
Click OK

Note1: Bookmarklets that work with selected text won't work because you can't select
       bookmarks when text is selected.
Note2: Some browsers will convert punctuation (;,<,}, ...) in javascript code
    to hex codes (%3B, %3C, ...)
The hex code version will not work in the dolphin browser.

I have a unix sed edit file which will remove them.  See unix shell utilities.

Note if the javascript has a " it will mess things up if you put it in a
href="JAVASCRIPT CODE" which can be dragged into your bookmark bar on other browsers.
If the script doesn't contain any 's you can use href='JAVASCRIPT CODE'.

Syncing
To set up Dolphin Connect, tap the gear shaped button in menu bar > Account > Dolphin
and login Dolphin Connect with your Facebook, Google or Dolphin account.

You can back up all your data including bookmarks under Menu> More> Settings> Privacy & Personal Data>
  Backup or sync bookmarks with our database by using Dolphin account directly.

Click on the 3rd top button "Sync" and click the sync "Dolphin to Google" -
that will put all of your bookmarks online on your google account
(i believe it makes a gDocs page) and then you can sync thm back and forth.

Add-ons (Extensions)
Dave McRitchie's list at Android Browsers (Navigation and Usage Comparison Table) Second table
Wi-Fi Broadcast, Desktop Mode, Text Sizer, Send to Browser, Tab History,
Screen Cut, Webzine, Dolphin Reader, Full Screen

Links:
5 Best Features of Dolphin Browser for Android (GuidingTech.com)
5 Must Have Add-Ons For The Dolphin Browser On Your Android Honeycomb Tablet
Android Dolphin FAQs


Links to some of Dave McRitchie's notes:  
  Support - Links (dolphin/dolphin_newtab.htm#dolphin_support)
  Install of a number of Bookmarklets into Dolphin (olphin/dolphin_gestures.htm#fastinstall)