The phrase "a proper visual" is correct and usable in written English.
It can be used when referring to an appropriate or suitable visual representation, such as an image, chart, or graphic that effectively conveys information.
Example: "For the presentation, we need to include a proper visual that clearly illustrates our main points."
Alternatives: "an appropriate visual" or "a suitable visual".
The group was trying to establish a proper visual background for the film".
If we don't have a proper visual arts education, all the other things that we are told to do, like diversification of our audience, will never happen.
Generally, Google has lacked a proper visual search option for soft goods shopping experience.
Current situation in the field of designing full-reference fidelity metrics is well characterized by the title of invited talk of M. Pedersen at Color Imaging Symposium in Gjovik Norwayy, 2009) "111 Full-Reference Image Quality Metrics and Still not Good Enough?" Thus, choice of a proper visual quality metric for analysis and comparisons is always a problem and can be argued.
Before filling any propane tank there must be a proper visual inspection of the cylinder.
As the underlying cause, they suggest that a lack of proper visual inspection lies at the root of late detection.
Opsin proteins have several measurable biochemical phenotypes (including λmax, active state stability, and regeneration rate), but proper visual pigment functioning requires an integrated protein for successful phototransduction.
Cohen and Dehaene et al. proposed that the Visual Word Form Area (VWFA) in the left midfusiform gyrus, contrary to its name, is limited to the extraction of an abstract letter string and not involved in proper visual word recognition.
This paper presents a design framework for automatic webpage coloring regarding several fundamental design objectives: proper visual contrasts, multi-color compatibility and semantic associations.
"Then we realised that he was not making proper visual contact, and discovered he was blind," Hastings Ward recalls.
