Adobe Acrobat 7 TIPS and TRICKS THE 100150 BEST [Electronic resources] نسخه متنی

Checking Your Scan Results

Many of the files you convert to PDF are composed of text and images that you can manipulate using a variety of tools. PDF files created by scans using older versions of Acrobat or from some programs, such as Photoshop, are images only; you can't make any changes to the file's contents. Here's a quick way to tell the difference.

Click the Select tool on the Basic toolbar. Then click an area of text on the document. If you see the flashing vertical bar cursor, you know the page contains text. If you click a text area on the document and the entire page is selected, you have an image PDF.

If you are scanning the document yourself and leave the default selection Make Searchable (OCR) in the Create PDF From Scanner dialog, the document is always converted to images and text.

The Art of Scanning

Acrobat includes filters that you can modify before scanning, or use to make adjustments if your test scan needs tweaking. Here's a rundown:

• Deskew rotates a skewed page so it's vertical. The default setting is automatic.

• Background removal is used with grayscale and color pages to make nearly-white areas white, resulting in clearer scans. The default is Low; you can also choose Medium and High options.

• Edge shadow removal gets rid of the black edges sometimes seen from scanned pages. The default is Cautious; an aggressive option is also available.

• Despeckle removes black marks from the page. Low is the default; you can also choose Medium and High.

• Descreen removes halftone dots, like those from a scanned newspaper. The default is Automatic: Acrobat applies the filter automatically for grayscale and RGB images of 300 ppi or higher.

• Halo removal removes high-contrast edges from color pages. The default setting is On.