Combo Boxes
A combo box combines a text field with a pull-down button in a single control. The user can enter a custom value into the field or click the button to choose from a list of predefined values. When the user enters a custom value, it’s not added to the list of choices.
Populate the field with a meaningful default value from the list. Although the field can be empty by default, it’s best when the default value alludes to the hidden choices. The default value doesn’t have to be the first item in the list.
Open up your hard drive and navigate to the Users folder. From the Users folder double-click on your username. The Dropbox folder is located in that folder along. Crop PDF on Mac. The area you select (the area inside the dotted box) will remain and the rest of the document will be cut. If you also need to crop multiple pages, go to the next page to choose the area to crop again. Out of the Box IT specializes in helping individuals and organizations of every size leverage their Apple technology.
Use an introductory label to let the user know what types of items to expect. Generally, labels should use title-style capitalization and end with a colon. For related guidance, see Labels.
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Provide relevant choices. Users appreciate being able to enter a custom value, but also appreciate the convenience of choosing from a list of the most likely choices.
Offer standalone choices. Combo boxes don’t allow multiple selections; the user can only choose a single value from the list.
Make sure list items aren’t wider than the text field. If an item is too wide, it can be truncated and hard to read.
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For related guidance, see Text Fields and Pull-Down Buttons. For developer guidance, see NSComboBox.