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Dioretsa is a PDF viewer that manages PDF files with tabs. The name of PDF file would be shown in the tab and window title. It can select tab by tab-list, search a word from search box and show outline of PDF file smoothly by using Dioretsa. In addition, view in full screen, show current PDF file in Finder and move among tabs are available.
When you would like to open PDF files, you can do it by ⌘+O, pushing "open PDF file" button, drag and drop PDF file to Dock icon of Dioretsa or right clicking on PDF files then choose Dioretsa at "open file (PDF only) with...".