Powerpoint 2007 help needed with hidden Action Button

I have a 2007 Powerpoint Presentation- on one of the slides I have created a hidden Action Button using a text box, the mouse click acts as a trigger which plays a sound file and opens a graphic- once clicked a second time the screen the graphic dissolves off the page. The hidden Action Button is a text box of a reasonable size and placed in the bottom right hand corner of the screen so it would be easy for the user to find (when you mouse over the button the hand symbol appears showing the hyperlink trigger) However in reality when you run the slide the hand symbol can only be viewed covering a very small area- making it virtually impossible to find quickly- I dont know why this has happened and need to ensure that this Action button covers a large enough area so that it can be quickly and easily found by the user. Please do not bother applying if you are not familiar with Action Buttons and please reply with the word TIGER in the first line of your response to show you have actually even bothered reading this description. Any other responses will be ignored. Thanks