[docs] print headings images added

docs/user/setup/docs.user.setup.letter_head.md

@@ -5,10 +5,22 @@
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 You can create / manage Letter Heads from:
 
-> Setup > Branding and Printing > Letter Heads
+> Setup > Printing > Letter Head > New Letter Head
+
+#### Step 1: Letter Head Name
+
+![Letter Head](img/letter-head1.png)
+
+
+#### Step 2 : Attach Image
+
+![Letter Head](img/letter-head2.png)
+
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+
 
 - Create an image with your logo, brand and other information that you want to put on your letter head.
-- Attach the image in your Letter Head record and click on “Set From Image” to automatically generate the HTML required for this Letter Head.
+- Attach the image in your Letter Head record by clicking on image icon to automatically generate the HTML required for this Letter Head.
 - If you want to make this the default letter head, click on “Is Default”.
 
 Thats it! Your letter head will now appear in all Prints and Emails of documents.

docs/user/setup/docs.user.setup.print_headings.md

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+---
+{
+	"_label": "Print Headings"
+}
+---
+Print Headings are the names which you can give to your sales invoices, supplier quotations etc. You can create a list of names for different business communications.
+
+You can create print headings from :
+
+> Setup > Printing > Print Heading > New Print Heading
+
+ 
+
+![Print Heading](img/print-heading1.png)
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+Example of a change in print heading is shown below:
+
+![Print Heading](img/print-heading2.png)
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