Here we are aligning a row of A with a column of B and vice-versa. The colon syntax cannot be used to specify this, we must also use the symbolic syntax. The statement:
REAL, DIMENSION(10,10) :: A, B !HPF$ ALIGN A(i,:) WITH B(:,i)
uses two symbols (a colon and i) to specify the first
dimension of A is aligned with the second dimension of B (the
symbol i) and
the second dimension of A is aligned with the first dimension of
B (the colon symbol). Again the colon implies conformance, in
other words, the first dimension of B has the same extent as the
second dimension of A.
Effectively this says: 
i, j, elements
A(i,j) and B(j,i) are local. This could also be written:
!HPF$ ALIGN A(:,j) WITH B(j,:)
this is similar to the first except that the symbol j is used and the conformance between dimensions is for the first dimension of A and the second dimension of B.
A further way of expressing this could be:
!HPF$ ALIGN A(i,j) WITH B(j,i)
Here i and j are ``symbols'' not variables and are used to match dimensions their value (if any) is unimportant. The only difference is that there is nothing implied about the extents of the dimensions.
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Figure 43 is supposed to show how elements A(1,:) (the first row of A) and B(:,1) (the first column of B) are aligned with each other and so on. A is aligned with the transpose of B.
Figure 43: Visualisation of Transposed 2D Alignment
The two shaded blobs are also aligned and are therefore resident on the same processor.
This alignment is suitable for,
A = A + TRANSPOSE(B)*A ! all local
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