The Input Box allows a visitor to enter a short string of characters such an e-mail address.  The box is inserted into the Form and can then be moved to any location on the Form by dragging and dropping.  Input Boxes are usually used along with Text objects, with the Text object explaining what should be entered into the Input Box.  An Input Box can be expanded left and right by moving your mouse over either edge.  You will see your cursor change to a double ended arrow. 

 

Disguised Text would look like this

 

The settings for the Input Box can be adjusted in the lower Form Settings panel.   Name - Just the name given to the Input Box, this is not displayed on the Form itself   Starting Text - This allows you to show the user what you want entered in the Input Box.  If you wanted an e-mail address you could enter "E-mail Address Here" or something similar.   Disguise Text - This is mainly used for entering sensitive information like passwords or credit card numbers.   Required Field - The Form will not send unless this field is filled out.   E-mail Address Field -  This option is used in conjunction with the Advanced tab and allows you to send the results of the Form to the visitor's e-mail address.  This will also be used as the FROM address when the e-mail is sent to you.   Background - The color of the background for the Input Box   Font Face - Allows you to change the font for this particular Input Box. You have access to all the Fonts on your computer in the fonts folder under Windows. (The the visitor filling in the Input Box will be typing in this font.)   Font Color -  Changes the color of the font your visitors will be typing in when filling in this Input Box.   Font Size - This changes the font size that will appear when a visitor is filling in the Input Box. Small, Medium and Large   Font Style - Changes the style of the text being entered into this Input Box. Regular, Bold, Italic or Bold and Italic