PDF Studio Viewer is a multi-platform PDF viewing app that allows you to display PDFs easily.
It allows you to display your PDF files with high fidelity and includes annotations & filling/saving interactive form fields, digital signatures & layers, and is displayed from a modern UI. You have access to commonly used tools like thumbnails & comment panes, loupe, pan & zoom, rulers & grids, advanced print & search options, and the ability to highlight text and copy it to your clipboard. You can also annotate PDF documents with text, graphics, and markup annotations.
PDF Studio Viewer doesn't include a large number of flashy bells and whistles, but it will certainly prove to be an efficient purpose-driven PDF viewer that will be easy to use for any skill-level user.