Convert DjVu or TIFF to PDF by two clicks.
Convert only pages, which you need.
Set resolution of pages which you convert.
Add your own bookmarks in the result's document. STDU Converter is easy to use. You need only select your DjVu or TIFF file and push button "Convert". You can select only pages, which you want to convert. Set resolution of these pages. Rotate some of these. Set brightness, contrast and gamma of resulting pages. You can create your own tree of content in the result's document.