Even if a trip from home to your office (or other principal place of business) has a specific business purposeâfor example, to meet with a client at your officeâit is still considered commuting and is not eligible for a mileage deductible if you start out from your home.
If /DEBUG is specified, the default for /OPT is NOREF, and all functions are preserved in the image. To override this default and optimize a debugging build, specify /OPT:REF. Because /OPT:REF implies /OPT:ICF, we recommend that you also specify /OPT:NOICF to preserve identical functions in debugging builds. This makes it easier to read stack traces and set breakpoints in functions that would otherwise be folded together. The /OPT:REF option disables incremental linking.
Alt/Option Key used in Mac OS X. The â¥ Opt key (often labeled option, â¥, alt) is used for: 1  Cursor control, with arrow keys. For example, ãâ¥ Opt+âã moves cursor by word.  Option key is used to insert special characters, such as ââ¢ â¢ Â©â. For example, ãâ¥+8ã will insert the bullet character ââ¢â.