You can create your new double underline character style as has been suggested. Then, under View > Customize Toolbar... drag and drop the character selector icon to your toolbar. When clicked, this icon drops a selection panel comprised of your character styles, including your double underline.
This would be handy for content in the upper third of your page, as the reach is reduced from the corresponding location in your styles drawer. For content on the bottom two-thirds of the page, character styles would be accessed faster from the styles drawer.
One way is to have a Pages document with examples of your frequently used (but awkward to create) formats (such as double underline). Save the document in a convenient location (I am not suggesting that you Save As Template).
For example, that document could contain the word "double" ready-formatted with double underline.
To format the word "double", type it into your Examples document and select it. Then click on the Fonts button in the toolbar. You may have to drag the right side of the document window to show this:
That will open the Fonts Window.
When you need double underline in a working document:
1. Type a space;
2. Left arrow to put the cursor before that space (that will isolate the double underline formatting);
3. Copy the double underlined word from your Examples document;
4. Paste it into your working document;
5. Select the word "double" and type your content;
6. To prevent double underline continuing, right arrow to place the cursor after the (non underlined) space and continue typing.
Once you have your Examples document, this process will take you less time to do than it took me to explain.
Charles B7 wrote:
Yipes -- so many things are easier and more intuitive in the Apple world, this seems oddly out of step.
Thanks for the ideas
You can't put up an icon for every bit of formatting, although Microsoft tries, and double underlining is an oddball one.
Having it as a menu option in the fonts window is not perfect but is accessible and probably as good as anything hidden in a football stadium crowd of rarely used icons.
As I said if you use it a lot, make it a Character Style, as you should for any repeated material.