I'm assuming you're talking about texts that move up from the bottom to the top? If so, simply:
//y position of texts
y_credits as integer = 600
//createtexts
Createtext(1,"bobby")
Createtext(2,"jeff")
Createtext(3,"jerome")
Createtext(4,"biggie")
Createtext(5,"barbara")
for i = 1 to 5
//set postion
SetTextPosition(i,120,y_credits)
//center text to the center
SetTextAlignment(i,1)
next i
do
y_credits = y_credits +-1
SetTextPosition(i,120,y_credits)
loop
So really just create your texts, and just change the Y position of them all. The same with photos using setspriteposition(sprite,x,y)