When dropping on a drawing or when placed using the "Image" function in Drafting, an image is displayed in or close to its original size.
To confirm an images actual original size, we recommend using a third part tool called "IrfanView" which will report its size with other image information as well (select 'Image -> Information' note 'Print size (from DPI)'):
When adding this image to NX, if it is not exactly the original size as previously confirmed (this image is large and NX scaled it down to fit best):
When this happens, just type in one value, with the lock remaining "yellow" and active to set it (the lock keeps its aspect ratio so both X and Y are kept synchronized):
Solution
Hardware/Software Configuration
Platform: INTL64
OS: windows
OS Version: 10_1903
Product: NX
Application: DRAFTING
Version: V11.0
Function: ANNOTATION
Ref: 002-8014592