Hyperlinks are a common feature of many presentations and are necessary, for example, when referencing sources or linking to a video or website during the presentation. Unfortunately, these links are often visually unappealing; the blue underlined text usually stands out due to its poor appearance and disrupts the slide's composition.
Fortunately, there are two tricks you can use to create hyperlinks without changing the text appearance:
Method 1: Text field as hyperlink
- Write the text that will serve as a link in a separate text field.
- Select the text box by clicking on its border. Do not select the text itself, but the entire box.
- Press CTRL + K to open the Insert Hyperlink dialog box and assign the appropriate link.
- Since the link was assigned to the text field and not to the text itself, the text formatting does not change.
- Another advantage of this method is that the text field, unlike the text itself, is very easy to click.

Method 2: Use of invisible surfaces
- This method is recommended if the link is to be part of a longer text and the text field method is therefore not applicable.
- Draw a rectangle over the desired hyperlink text.
- Make the rectangle invisible by choosing white as the fill color with 100% transparency and no line color.
- Finally, assign the appropriate hyperlink to the rectangle.

To avoid forgetting where the link is and to visually emphasize it, you can format the text in bold or italics with both methods. This way, the link is recognizable but doesn't stand out negatively.
Customize file path display
Hyperlinks can generally only be clicked during the slideshow, and the file path is displayed for linked files. If you want to prevent this, click the Tooltip button in the dialog box when assigning the link. 
Enter meaningful text (or nothing at all) in the field that appears and close the dialog box. The text you entered will now replace the default file path when you hover your mouse over the link.