2 added 40 characters in body
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Your context (an instructional manual) does not justify that degree of formality. You want to say "as described below".

But if you were writing a legal contract, something like it might be used. However, an article is required:

... in the manner set forth below.

or simply

... as set forth below.

The word hereinafter means "henceforward in this document", so it does not mean "as described below". Here is how it is used:

Gamilato (hereinafter "Questioner") ...

It means that when the word Questioner is encountered later in the document, it refers to "Gamilato".

Your context (an instructional manual) does not justify that degree of formality. You want to say "as described below".

But if you were writing a legal contract, something like it might be used. However, an article is required:

... in the manner set forth below.

The word hereinafter means "henceforward in this document", so it does not mean "as described below". Here is how it is used:

Gamilato (hereinafter "Questioner") ...

It means that when the word Questioner is encountered later in the document, it refers to "Gamilato".

Your context (an instructional manual) does not justify that degree of formality. You want to say "as described below".

But if you were writing a legal contract, something like it might be used. However, an article is required:

... in the manner set forth below.

or simply

... as set forth below.

The word hereinafter means "henceforward in this document", so it does not mean "as described below". Here is how it is used:

Gamilato (hereinafter "Questioner") ...

It means that when the word Questioner is encountered later in the document, it refers to "Gamilato".

1
source | link

Your context (an instructional manual) does not justify that degree of formality. You want to say "as described below".

But if you were writing a legal contract, something like it might be used. However, an article is required:

... in the manner set forth below.

The word hereinafter means "henceforward in this document", so it does not mean "as described below". Here is how it is used:

Gamilato (hereinafter "Questioner") ...

It means that when the word Questioner is encountered later in the document, it refers to "Gamilato".