# PDF Manager support

##### Contact support

Please check the frequently-asked questions below. If your question isn't covered, email our support for a prompt reply.

[Contact support](mailto:pdfmanagersupport@user.camp)

## How do I use PDF Manager as a PDF viewer? [🔗](/content/support/pdf-manager/#17/index.html)

To use PDF Manager as a viewer, press the fourth view option in the top-middle of the app.

## How do I merge to PDFs? [🔗](/content/support/pdf-manager/#16/index.html)

In PDF Manager, open the first source PDF with the `Open PDF` button.

Once the first PDF is loaded, press `Merge PDF` and select another PDF. The new PDF will appear as a stack of pages, appended to the first PDF.

You can then drag the documents, pages, or ranges of pages (by shift-clicking) to reorder them.

If you need to reorder pages across document stacks, switch to a thumbnail view.

## How can I save a PDF without overwriting the original? [🔗](/content/support/pdf-manager/#18/index.html)

To make changes to a PDF without overwriting the original, take these steps:

- Open the source PDF
- Press `Duplicate`

A new PDF called **New document** will appear. Make your changes here, then press `Save` to save your changes in the new PDF without affecting the source PDF.

Alternatively, open your PDF and press the `Save As` button that appears. Enter a new filename for the duplicated PDF. Your PDF will be copied, and any edits you make to it will apply to the new copy and not the original.