need help adding an item to fitday

I"m having trouble adding a new item to my fitday. I ate 1/2 of a small tuna on wheat bread & I'm having trouble adding that to my intake for today.  it doesn't have just plain tuna or 1/2 wheat bun. can you tell me how to add this as I don't know all the carb ,cal, & etc. to this sandwich. thanks, Brenda

You'll have to enter the info for the entire wheat bun, and then put       .5        in to update the serving size for it to be accurate for 1/2.  If you ate three fourths of the bun, put in .75, etc.  You should see the nutrition info change once you plug in the decimal and update it. If you refine your search, you should find plain tuna available as well, try entering a name brand like Starkist, you'll be surprised the options that pop up. <---------- likes Fitday.com