When it comes to creating a Donation button (assuming that's what you have in mind) using the online button creator, you are a bit limited as to the number of options you can include. Per your post, your item button needs to be manually created.
Below is just one example of how you could your button. This one has an input box on the page for an amount, a dropdown for the location selection and radio buttons for the offering selection. Free free to tweak for your needs. Note the example is a complete web page for ease of testing.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Button Example Code</title>
<!-- START META TAG SECTION -->
<meta charset="utf-8">
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
<meta http-equiv="Content-Language" content="en">
<!-- END META TAG SECTION -->
</head>
<body>
<!-- START SAMPLE CODE SECTION -->
<!-- PARAGRAPH 1 -->
Donation Examples
<br><br>
Using Options.
<br><br>
Widget Fund
<br><br>
<!-- Start of Form -->
<form target="paypal" action="https://www.paypal.com/cgi-bin/webscr" method="post">
<!-- If using a Business or Company Logo Graphic, include the "cpp_header_image" variable in your View Cart code. -->
<input type="hidden" name="cpp_header_image" value="https://yourwebsite.com/logo.jpg">
<input type="hidden" name="cmd" value="_donations">
<!-- Replace "business" value with your PayPal Email Address or Account ID -->
<input type="hidden" name="business" value="your email address">
<input type="hidden" name="item_name">
<input type="hidden" name="item_number" value="D-1001">
<input type="hidden" name="tax" value="0">
<input type="hidden" name="no_shipping" value="2">
<input type="hidden" name="lc" value="US">
<input type="hidden" name="currency_code" value="USD">
<!-- Replace value with the web page you want the customer to return to after a successful transaction -->
<input type="hidden" name="return" value="http://www.yourwebsite.com/ThankYou.html">
<!-- Replace value with the web page you want the customer to return to after item cancellation -->
<input type="hidden" name="cancel_return" value="http://www.yourwebsite.com/Cancel.html">
<input type="hidden" name="bn" value="PP-DonationsBF:btn_donateCC_LG.gif:NonHosted">
<input type="hidden" name="button_subtype" value="products">
<input type="hidden" name="no_note" value="0">
<input type="hidden" name="cn" value="Add special instructions to the seller:">
<!-- -->
Please enter your donation amount: (Example - 10.00)
<br><br>
<input type="text" name="amount" size="5">
<br><br>
Choose Your Location:
<select name="item_name">
<option value="West Side Church" selected>West Side Church</option>
<option value="Downtown Church">Downtown Church</option>
</select>
<br><br>
<input type="hidden" name="on0" value="Purpose">Purpose
<INPUT NAME="os0" type="radio" value="Tithes" checked>Tithes
<INPUT NAME="os0" type="radio" value="Offerings">Offerings
<br><br>
<!-- -->
<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donateCC_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
<img alt="" border="0" src="https://www.paypalobjects.com/en_US/i/scr/pixel.gif" width="1" height="1">
</form>
<!-- End of Form -->
<!-- END BUTTON EXAMPLES -->
<!-- END SAMPLE CODE SECTION -->
<br><br>
<br><br><br><br>
<hr align="left" width="50%" noshade>
<br><br>
NOTES:
<br>
In order to test the code, you must replace the "business" value variable with your PayPal Email Address or Account ID.
</body>
</html>
