Strictly speaking, when tearing one’s clothing upon seeing the Kotel, one is required to tear all of his garments. However, the common custom is to tear only one garment. If a person does not wish to rip his jacket, he should remove it and tear only his shirt

Even in our times, one remains obligated to tear his clothing upon seeing the place where the Bet HaMikdash once stood. This mitzvah is a tangible expression of our mourning for its destruction and our longing for its rebuilding. The obligation applies when one sees the Dome of the Rock, which occupies the very location where the Bet HaMikdash once stood, as well as when one sees the Kotel.

May one touch a Torah Scroll? It is forbidden to touch the klaf (parchment) of a Sefer Torah with bare hands, even if the contact is only momentary. The common custom is to touch the torah with a tallit when needed.

What Does The Congregation Do During Hagbahah? During Hagbah, it is customary for the entire congregation to look at the script of the Sefer Torah as it is lifted and turned for all to see. At that moment, everyone should recite the verse: "וזאת התורה אשר שם משה לפני בני ישראל"—“This is the Torah that Moshe placed before the Children of Israel”

Who Should Do Hagbahah? The honor of performing Hagbahah (the lifting of the Sefer Torah after the reading) is considered extremely significant. Our Rabbis and poskim emphasize that the spiritual reward for Hagbahah is immense, to the point that it is said to be equal to the combined reward of all those who received aliyot to the Torah that day. 

During Hagbah, the Sefer Torah should ideally be opened wide enough so that three columns of text are visible. However, this depends on the strength of the Magbiyah (the one performing Hagbah). If he is strong, he may open it wider than three columns; if he is weaker, he may open it less. In Sephardic communities, the custom is simply to open the Sefer Torah as much as it naturally opens generally about one full column and this is considered to fully fulfill the requirement.