Adobe Acrobat is a very useful tool to preserves the formatting of the
original document, for example layout of the document and particularly
for large documents, or those containing the images. While reading the
PDF file, you can enjoy the advance feature of Highlight Tool in latest
Adobe Acrobat profession 6.0 versions. You can easily highlight the text
in PDF file with different colors just as you would in a hard copy
document.
Follow the given steps to highlight the PDF files using Adobe Acrobat:
First click on Start button, go
to Program then click on "Adobe Acrobat 6.0 professional" to run
this application.

Now go to File menu and click on Open option to open any
PDF file. Here a small dialog will appear with title "Open".
Here click on Tools and go to Commenting > Highlighting then Highlighter
Tools, now you mouse pointer will display into a cursor shape.

Now simply select the text that you want to highlight and your required
text is highlighted.

Here you can find different types of colors to highlight the text. To
change the highlighter color, select the text, click right and select
Properties from the shortcut menu.

Click on Color button and select the color from color drop-down menu.

At the end, click on Close button to finish the process and your
selected highlight color is applied to the text.