wow- i didn't know there were irons out there with --- just dots- no clues-
every iron (except my little clover mini's) have settings from nylon all the way up to linen (coolest-to hottest)
i would (assume) that the highest (dot) on yours would be what you need for most fusables- they tend to need a cotton setting-
there are some (low-heat) ones though so adjust accordingly.
if irons are going in a direction that they no longer are going to give us fabric options i think i will stick to thrift store old irons. or really pay attention to the pictures on the packaging so i know i have the settings i need.