Hyperlinks and URLs
Hyperlinks can be used in Calc to jump to a different location from within a spreadsheet and can lead to other parts of the current file, to different files or even to web sites.
Relative and absolute hyperlinks
Hyperlinks can be stored within your file as either relative or absolute.
A relative hyperlink says, Here is how to get there from where you are now (meaning the folder in which your current document is saved) while an absolute hyperlink says, Here is how to get there no matter where you start from.
An absolute link will stop working only if the target is moved. A relative link will stop working only if the start and target locations change relative to each other. For instance, if you have two spreadsheets in the same folder linked to each other and you move the entire folder to a new location, a relative hyperlink will not break.
To change the way that OOo saves the hyperlinks in your file, select Tools > Options > Load/Save > General and choose if you want URLs saved relatively when referencing the File System, or the Internet, or both.
Calc will always display an absolute hyperlink. Don’t be alarmed when it does this even when you have chosen a relative hyperlink — this 'absolute' target address will be updated if you move the file..
Creating hyperlinks
When you type text that can be used as a hyperlink (such as a website addresses or URL), Calc formats it automatically, creating the hyperlink and applying to the text a color and background shading. If this does not happen, you can enable this feature using Tools > AutoCorrect options > Options and selecting URL Recognition.
You can also insert and modify links using the Hyperlink dialog. To display the dialog, click the Hyperlink icon 
on the Standard toolbar or choose Insert > Hyperlink from the menu bar. To turn existing text into a link, highlight it before opening the Hyperlink dialog.
On the left hand side, select one of the four types of hyperlinks:
- Internet: the hyperlink points to a web address, normally starting with http://
- Mail & News: the hyperlink opens an email message that is pre-addressed to a particular recipient.
- Document: the hyperlink points to a place in either the current document or another existing document.
- New document: the hyperlink creates a new document.
The top right part of the dialog changes according to the choice made for the hyperlink category from the left panel. A full description of all the choices, and their interactions, is beyond the scope of this chapter. Here is a summary of the most common choices used in presentations.
For an Internet hyperlink, choose the type of hyperlink (choose between Web, FTP or Telnet), and enter the required web address (URL).
For a Mail and News hyperlink, specify whether it is a mail or news link, the receiver address and for email, also the subject.
For a Document hyperlink, specify the document path (the Open File button opens a file browser); leave this blank if you want to link to a target in the same spreadsheet. Optionally specify the target in the document (for example a specific sheet). Click on the Target icon to open the Navigator where you can select the target, or if you know the name of the target, you can type it into the box.
For a New Document type hyperlink, specify whether to edit the newly created document immediately (Edit now) or just create it (Edit later) and enter the file name and the type of document to create (text, spreadsheet, etc.). The Select path button opens a directory picker dialog.
The Further settings section in the bottom right part of the dialog is common to all the hyperlink types, although some choices are more relevant to some types of links.
- Set the value of Frame to determine how the hyperlink will open. This applies to documents that open in a Web browser.
- Form specifies if the link is to be presented as text or as a button. The figure below shows a link formatted as a button.
- Text specifies the text that will be visible to the user. If you do not enter anything here, Calc will use the full URL or path as the link text. Note that if the link is relative and you move the file, this text will not change, though the target will.
- Name is applicable to HTML documents. It specifies text that will be added as a NAME attribute in the HTML code behind the hyperlink.
- Event button: this button will be activated to allow Calc to react to events for which the user has written some code (macro). This function is not covered in this chapter.
Editing hyperlinks
To edit an existing link, place the cursor anywhere in the link and click the hyperlink icon on the standard toolbar or select Edit > Hyperlink. The Hyperlink dialog opens. If the Hyperlink is in button form, the spreadsheet must have Design
Mode on in order to edit the Hyperlink. Make your changes and click Apply. If you need to edit several hyperlinks, you can leave the Hyperlink dialog open until you have edited all of them. Be sure to click Apply after each one. When you are finished, click Close.
Removing hyperlinks
You can remove the clickable link from hyperlink text — leaving just the text — by right-clicking on the link and selecting Default Formatting. This option is also available from the Format menu. You may then need to re-apply some formatting in order for it to match the rest of your document.
To erase the link text or button from the document completely, select and press the Backspace or Delete key.
