Dear forum members
Hi! I am asking the second question on this forum.
Thank you so much the last time. I was helped so much.
I have still been reading "Serious about Trout Fishing" by
Tony Orman and John Morton.
There is a paragraph on page 115, Chapter 16 : "Fishing the Surface Film".
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Rather than watch the rise in the fading light,
an easier way is to watch for any adult flies floating down.
Particularly if you are facing the western sky at dusk,
flies may be spotted quite easily. If these are taken by a trout,
then the dry fly is called for. Otherwise you should fish in the
surface film. The key is to use a wet fly or lightly-dressed nymph,
preferably with the cast greased to float.
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I can not get the meaning of the word "greased" in the last sentence.
"preferably with the cast greased to float."
Does the word "grease" mean put some floatant onto the fly line?
Or make a soft presentation cast to prevent disturbing the water surface?
If someone has time, please help me to understand it.
I would appreciate so much.