# Guides

How to do the things people actually open a scanner app for. Every one of these is free in Scan Clan.

## All guides

### How to scan a document to PDF on Android

Scan a paper document to PDF with an Android phone: frame the page, let edge detection straighten it, pick a filter, and save or share the PDF. [Read the guide](/guides/scan-documents-to-pdf-on-android/)

### How to sign a PDF on your phone

Sign a PDF from your phone: draw a signature or photograph the one you wrote on paper, save it once, and drop it onto any document. [Read the guide](/guides/sign-a-pdf-on-your-phone/)

### How to compress a PDF to under 1 MB

Shrink a PDF to fit an upload limit on your phone, and see the new file size before you save it. [Read the guide](/guides/compress-a-pdf-to-under-1mb/)

### How to remove glare and shadows from a scanned page

Fix the shadow your own hand casts and the bright patch a lamp leaves on a glossy page, using the Glare Removal and No Shadow filters. [Read the guide](/guides/remove-glare-and-shadows-from-a-scan/)

### How to scan a document without a watermark

Scan to PDF without an app watermark stamped across the page, and add your own watermark only when you actually want one. [Read the guide](/guides/scan-a-document-without-a-watermark/)

> **Something missing?** Tell us what you were trying to do and we will write it up — [support@spirikle.com](mailto:support@spirikle.com).

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_Scan Clan · https://spirikle.com/guides/ · published by Spirikle · support@spirikle.com_