How to display company logo in workplace (work item preview)?

Go to "WI display" tab of your dialog step.
use function module SWL0_PREVIEW_DEMO_GIF_ONLY (logo only) or 
SWL0_PREVIEW_DEMO_TEXT_AND_GIF (logo plus text) as template to create your own.

For the image:
go to tx SMW0, 
- choose binary 
- then click the blue table icon 
- execute the transaction. 

You'll get a table where you can add your own logo.
For e.g. your image is called Zmiguel, type .gif. 

To be able to see it you have to assign an editor (settings-->assign myme editor) assign iexplorer for example to image/gif type.

Then in your function (copy of FM SWL0_PREVIEW_DEMO_GIF_ONLY  or
SWL0_PREVIEW_DEMO_TEXT_AND_GIF) 
add:
e_info-gif-id    = 'ZMIGUEL'.
e_info-gif-ALIGN = 'R'.

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