No multiline column name when using vertical slash | in UItable

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When creating a Uitable inside a figure according to the documentation if i use a vertical slash while naming the columns i can create a new line, but when i code it it only appears the vertical slash |

d =    {'LogStart', 0.2, 'Log End', 800, 3000};
ColumnNames = {'BGGas top|Zone name', 'BGGas value|%',...
    'BGGas base|zone name', 'BGGas top|zone depth',...
    'BGGas base|zone depth'};
zones = {'LogStart', 'Neogene', 'Paleogene', 'Cretaceous', 'Jurassic',...
    'Triassic', 'Permian', 'Carboniferous', 'Devonian', 'Silurian',...
    'Ordivician', 'Cambrian'};
fig = uifigure('Name', 'Enter Background Gas Value',...
    'CloseRequestFcn',@Parent_closefcn);
%-------Table------
uit = uitable(fig);
uit.Position(1:2) = [10,150];
uit.Position(3:4) = [fig.Position(3)-20, fig.Position(4)-220];
uit.ColumnSortable = false;
uit.RowName = 'numbered';
uit.ColumnName = ColumnNames;
uit.Data = d;
uit.ColumnFormat = {zones, 'numeric', 'char', 'numeric', 'numeric'};
uit.ColumnEditable = [true true false false false true];