التصوير بالفلاش في قواعد الزيارة، وممنوع اللمس.

Because Arabic usually leaves out the present-tense verb to be.

So ممنوع اللمس literally looks like forbidden the-touching, but naturally it means touching is forbidden.

This is called a nominal sentence. In the present tense, Arabic normally does not say a separate word for is / are.

التصوير is a verbal noun (often called a maṣdar) from the verb صوَّرَ, which can mean to photograph or to depict.

Here, التصوير means photography / photographing as an activity.

So in this sentence, it is not a finite verb like he photographs. It is the noun photography.

The prefix بـ often means with, by, or by means of.

So:

• الفلاش = the flash
• بالفلاش = with flash

That is why التصوير بالفلاش means photography with flash, or more naturally in English, flash photography.

This is an iḍāfa construction, often translated as X of Y.

• قواعد = rules
• الزيارة = the visit / visiting

Together, قواعد الزيارة means the rules of the visit or more naturally the visiting rules / visitor rules.

A key point: in an iḍāfa, the first noun usually does not take الـ, while the second one can. The whole phrase becomes definite because الزيارة is definite.

Literally, yes, في means in.

But prepositions do not always match English exactly. In a sentence like this, في قواعد الزيارة can be understood more loosely as:

• in the visitor rules
• under the visiting rules
• according to the rules of the visit

So it points to the context of the rules, not necessarily physical location.

Yes, very common.

Arabic signs often use:

ممنوع + verbal noun / noun

For example:

• ممنوع التدخين = No smoking
• ممنوع الدخول = No entry
• ممنوع اللمس = No touching / Touching is prohibited

This style sounds formal and impersonal, which is why it is common on notices and signs.

Both are possible.

• ممنوع اللمس = very sign-like, compact, notice-style
• اللمس ممنوع = also correct, a bit more like a full statement

Arabic word order is more flexible than English. Putting ممنوع first gives a strong prohibited feeling right away.

In Arabic, verbal nouns often take الـ when they refer to an activity as a general category.

So:

• التصوير = photography / photographing
• اللمس = touching

This does not have to mean one specific act. It can simply mean the activity in general, especially in formal or sign-style language.

Yes. It has a concise, notice-style feel.

Arabic signs and public rules often leave out words that are obvious from context. So the wording can feel compressed compared with full textbook sentences.

That is very normal in museum signs, public notices, and rule lists.